diff --git a/osc/core.py b/osc/core.py
index 27ba092b..682b0096 100644
--- a/osc/core.py
+++ b/osc/core.py
@@ -4634,53 +4634,37 @@ def create_submit_request(
     src_package: Optional[str] = None,
     dst_project: Optional[str] = None,
     dst_package: Optional[str] = None,
-    message="",
-    orev=None,
-    src_update=None,
-    dst_updatelink=None,
+    message: str = "",
+    orev: Optional[str] = None,
+    src_update: Optional[str] = None,
+    dst_updatelink: Optional[bool] = None,
 ):
-    options_block = ""
-    package = ""
-    if src_package:
-        package = f"""package="{src_package}" """
-    options_block = "<options>"
-    if src_update:
-        options_block += f"""<sourceupdate>{src_update}</sourceupdate>"""
-    if dst_updatelink:
-        options_block += """<updatelink>true</updatelink>"""
-    options_block += "</options>"
+    from . import obs_api
 
-    # Yes, this kind of xml construction is horrible
-    targetxml = ""
-    if dst_project:
-        packagexml = ""
-        if dst_package:
-            packagexml = f"""package="{dst_package}" """
-        targetxml = f"""<target project="{dst_project}" {packagexml} /> """
-    # XXX: keep the old template for now in order to work with old obs instances
-    xml = """\
-<request>
-    <action type="submit">
-        <source project="%s" %s rev="%s"/>
-        %s
-        %s
-    </action>
-    <state name="new"/>
-    <description>%s</description>
-</request>
-""" % (src_project,
-       package,
-       orev or show_upstream_rev(apiurl, src_project, src_package),
-       targetxml,
-       options_block,
-       _html_escape(message))
+    req = obs_api.Request(
+        action_list=[
+            {
+                "type": "submit",
+                "source": {
+                    "project": src_project,
+                    "package": src_package,
+                    "rev": orev or show_upstream_rev(apiurl, src_project, src_package),
+                },
+                "target": {
+                    "project": dst_project,
+                    "package": dst_package,
+                },
+                "options": {
+                    "sourceupdate": src_update,
+                    "updatelink": "true" if dst_updatelink else None,
+                }
+            },
+        ],
+        description=message,
+    )
 
-    u = makeurl(apiurl, ["request"], query={"cmd": "create"})
-    r = None
     try:
-        f = http_POST(u, data=xml)
-        root = ET.parse(f).getroot()
-        r = root.get('id')
+        new_req = req.cmd_create(apiurl)
     except HTTPError as e:
         if e.hdrs.get('X-Opensuse-Errorcode') == "submit_request_rejected":
             print('WARNING: As the project is in maintenance, a maintenance incident request is')
@@ -4700,11 +4684,11 @@ def create_submit_request(
                 raise oscerr.APIError("Server did not define a default maintenance project, can't submit.")
             tproject = project.get('name')
             r = create_maintenance_request(apiurl, src_project, [src_package], tproject, dst_project, src_update, message, rev=orev)
-            r = r.reqid
+            return r.reqid
         else:
             raise
 
-    return r
+    return new_req.id
 
 
 def get_request(apiurl: str, reqid):
diff --git a/osc/obs_api/__init__.py b/osc/obs_api/__init__.py
index 7216b78b..7bc9a365 100644
--- a/osc/obs_api/__init__.py
+++ b/osc/obs_api/__init__.py
@@ -1,2 +1,4 @@
 from .package import Package
+from .package_sources import PackageSources
 from .project import Project
+from .request import Request
diff --git a/osc/obs_api/enums.py b/osc/obs_api/enums.py
index a5c143cb..f7c55be7 100644
--- a/osc/obs_api/enums.py
+++ b/osc/obs_api/enums.py
@@ -67,6 +67,13 @@ class LocalRole(str, Enum):
     READER = "reader"
 
 
+class ObsRatings(str, Enum):
+    LOW = "low"
+    MODERATE = "moderate"
+    IMPORTANT = "important"
+    CRITICAL = "critical"
+
+
 class RebuildModes(str, Enum):
     TRANSITIVE = "transitive"
     DIRECT = "direct"
@@ -77,3 +84,13 @@ class ReleaseTriggers(str, Enum):
     MANUAL = "manual"
     MAINTENANCE = "maintenance"
     OBSGENDIFF = "obsgendiff"
+
+
+class RequestStates(str, Enum):
+    REVIEW = "review"
+    NEW = "new"
+    ACCEPTED = "accepted"
+    DECLINED = "declined"
+    REVOKED = "revoked"
+    SUPERSEDED = "superseded"
+    DELETED = "deleted"
diff --git a/osc/obs_api/linkinfo.py b/osc/obs_api/linkinfo.py
new file mode 100644
index 00000000..64253732
--- /dev/null
+++ b/osc/obs_api/linkinfo.py
@@ -0,0 +1,41 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class Linkinfo(XmlModel):
+    XML_TAG = "linkinfo"
+
+    project: str = Field(
+        xml_attribute=True,
+    )
+
+    package: str = Field(
+        xml_attribute=True,
+    )
+
+    lsrcmd5: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    xsrcmd5: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    baserev: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    rev: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    srcmd5: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    error: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    missingok: Optional[bool] = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/package.py b/osc/obs_api/package.py
index 83783e9e..8c2967d7 100644
--- a/osc/obs_api/package.py
+++ b/osc/obs_api/package.py
@@ -69,12 +69,13 @@ class Package(XmlModel):
 
     @classmethod
     def from_api(cls, apiurl, project, package, *, rev=None):
+        # ``rev`` is metadata revision, not revision of the source code
         url_path = ["source", project, package, "_meta"]
         url_query = {
             "rev": rev,
         }
         response = cls.xml_request("GET", apiurl, url_path, url_query)
-        return cls.from_file(response)
+        return cls.from_file(response, apiurl=apiurl)
 
     def to_api(self, apiurl, *, project=None, package=None):
         project = project or self.project
@@ -82,7 +83,7 @@ class Package(XmlModel):
         url_path = ["source", project, package, "_meta"]
         url_query = {}
         response = self.xml_request("PUT", apiurl, url_path, url_query, data=self.to_string())
-        return Status.from_file(response)
+        return Status.from_file(response, apiurl=apiurl)
 
     @classmethod
     def cmd_release(
@@ -124,4 +125,4 @@ class Package(XmlModel):
             "nodelay": nodelay,
         }
         response = cls.xml_request("POST", apiurl, url_path, url_query)
-        return Status.from_string(response.read())
+        return Status.from_file(response, apiurl=apiurl)
diff --git a/osc/obs_api/package_sources.py b/osc/obs_api/package_sources.py
new file mode 100644
index 00000000..51c74f2f
--- /dev/null
+++ b/osc/obs_api/package_sources.py
@@ -0,0 +1,68 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+from .linkinfo import Linkinfo
+from .package_sources_file import PackageSourcesFile
+from .serviceinfo import Serviceinfo
+
+
+class PackageSources(XmlModel):
+    XML_TAG = "directory"
+
+    name: str = Field(
+        xml_attribute=True,
+    )
+
+    rev: str = Field(
+        xml_attribute=True,
+    )
+
+    vrev: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    srcmd5: str = Field(
+        xml_attribute=True,
+    )
+
+    linkinfo: Optional[Linkinfo] = Field(
+    )
+
+    serviceinfo: Optional[Serviceinfo] = Field(
+    )
+
+    file_list: Optional[List[PackageSourcesFile]] = Field(
+        xml_name="entry",
+    )
+
+    @classmethod
+    def from_api(
+        cls,
+        apiurl: str,
+        project: str,
+        package: str,
+        *,
+        deleted: Optional[bool] = None,
+        expand: Optional[bool] = None,
+        meta: Optional[bool] = None,
+        rev: Optional[str] = None,
+    ):
+        """
+        :param deleted: Set to ``True`` to list source files of a deleted package.
+                        Throws 400: Bad Request if such package exists.
+        :param expand: Expand links.
+        :param meta: Set to ``True`` to list metadata file (``_meta``) instead of the sources.
+        :param rev: Show sources of the specified revision.
+        """
+        from ..core import revision_is_empty
+
+        if revision_is_empty(rev):
+            rev = None
+
+        url_path = ["source", project, package]
+        url_query = {
+            "deleted": deleted,
+            "expand": expand,
+            "meta": meta,
+            "rev": rev,
+        }
+        response = cls.xml_request("GET", apiurl, url_path, url_query)
+        return cls.from_file(response, apiurl=apiurl)
diff --git a/osc/obs_api/package_sources_file.py b/osc/obs_api/package_sources_file.py
new file mode 100644
index 00000000..add82edd
--- /dev/null
+++ b/osc/obs_api/package_sources_file.py
@@ -0,0 +1,28 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class PackageSourcesFile(XmlModel):
+    XML_TAG = "entry"
+
+    name: str = Field(
+        xml_attribute=True,
+    )
+
+    md5: str = Field(
+        xml_attribute=True,
+    )
+
+    mtime: int = Field(
+        xml_attribute=True,
+    )
+
+    size: int = Field(
+        xml_attribute=True,
+    )
+
+    skipped: Optional[bool] = Field(
+        xml_attribute=True,
+    )
+
+    def _get_cmp_data(self):
+        return (self.name, self.mtime, self.size, self.md5, self.skipped or False)
diff --git a/osc/obs_api/project.py b/osc/obs_api/project.py
index ecec9b50..f439a3a2 100644
--- a/osc/obs_api/project.py
+++ b/osc/obs_api/project.py
@@ -112,14 +112,14 @@ class Project(XmlModel):
         url_path = ["source", project, "_meta"]
         url_query = {}
         response = cls.xml_request("GET", apiurl, url_path, url_query)
-        return cls.from_file(response)
+        return cls.from_file(response, apiurl=apiurl)
 
     def to_api(self, apiurl, *, project=None):
         project = project or self.name
         url_path = ["source", project, "_meta"]
         url_query = {}
         response = self.xml_request("PUT", apiurl, url_path, url_query, data=self.to_string())
-        return Status.from_file(response)
+        return Status.from_file(response, apiurl=apiurl)
 
     def resolve_repository_flags(self, package_obj=None):
         """
diff --git a/osc/obs_api/request.py b/osc/obs_api/request.py
new file mode 100644
index 00000000..62d8e9cd
--- /dev/null
+++ b/osc/obs_api/request.py
@@ -0,0 +1,140 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+from .enums import ObsRatings
+from .request_action import RequestAction
+from .request_history import RequestHistory
+from .request_review import RequestReview
+from .request_state import RequestState
+
+
+class Request(XmlModel):
+    XML_TAG = "request"
+
+    id: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    actions: Optional[int] = Field(
+        xml_attribute=True,
+    )
+
+    creator: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    action_list: List[RequestAction] = Field(
+        xml_name="action",
+    )
+
+    state: Optional[RequestState] = Field(
+    )
+
+    description: Optional[str] = Field(
+    )
+
+    priority: Optional[ObsRatings] = Field(
+    )
+
+    review_list: Optional[List[RequestReview]] = Field(
+        xml_name="review",
+    )
+
+    history_list: Optional[List[RequestHistory]] = Field(
+        xml_name="history",
+    )
+
+    title: Optional[str] = Field(
+    )
+
+    accept_at: Optional[str] = Field(
+    )
+
+    @classmethod
+    def from_api(
+        cls,
+        apiurl: str,
+        request_id: int,
+        *,
+        with_history: Optional[bool] = None,
+        with_full_history: Optional[bool] = None
+    ) -> "Request":
+        """
+        Return the specified request.
+
+        :param request_id: Id of the request.
+        :param withhistory: Include the request history in the results.
+        :param withfullhistory: Includes both, request and review history in the results.
+        """
+        url_path = ["request", request_id]
+        url_query = {
+            "withhistory": with_history,
+            "withfullhistory": with_full_history,
+        }
+        response = cls.xml_request("GET", apiurl, url_path, url_query)
+        return cls.from_file(response, apiurl=apiurl)
+
+    @classmethod
+    def cmd_diff(
+        cls,
+        apiurl: str,
+        request_id: int,
+        *,
+        with_issues: Optional[bool] = None,
+        with_description_issues: Optional[bool] = None,
+        diff_to_superseded: Optional[int] = None
+    ) -> "Request":
+        """
+        Return the specified request including a diff of all packages in the request.
+
+        :param request_id: Id of the request.
+        :param with_issues: Include parsed issues from referenced sources in the change files.
+        :param with_description_issues: Include parsed issues from request description.
+        :param diff_to_superseded: Diff relatively to the given superseded request.
+        """
+        url_path = ["request", str(request_id)]
+        url_query = {
+            "cmd": "diff",
+            "view": "xml",
+            "withissues": with_issues,
+            "withdescriptionissues": with_description_issues,
+            "diff_to_superseded": diff_to_superseded,
+        }
+        response = cls.xml_request("POST", apiurl, url_path, url_query)
+        return cls.from_file(response, apiurl=apiurl)
+
+    def get_issues(self):
+        """
+        Aggregate issues from action/sourcediff into a single list.
+        The list may contain duplicates.
+
+        To get any issues returned, it is crucial to load the request with the issues
+        by calling ``cmd_diff()`` with appropriate arguments first.
+        """
+        result = []
+        for action in self.action_list or []:
+            if action.sourcediff is None:
+                continue
+            for issue in action.sourcediff.issue_list or []:
+                result.append(issue)
+        return result
+
+    def cmd_create(self,
+        apiurl: str,
+        *,
+        add_revision: Optional[bool] = None,
+        enforce_branching: Optional[bool] = None,
+        ignore_build_state: Optional[bool] = None,
+        ignore_delegate: Optional[bool] = None,
+    ):
+        """
+        :param add_revision: Ask the server to add revisions of the current sources to the request.
+        :param ignore_build_state: Skip the build state check.
+        :param ignore_delegate: Enforce a new package instance in a project which has OBS:DelegateRequestTarget set.
+        """
+        url_path = ["request"]
+        url_query = {
+            "cmd": "create",
+            "addrevision": add_revision,
+            "ignore_delegate": ignore_delegate,
+        }
+        response = self.xml_request("POST", apiurl, url_path, url_query, data=self.to_string())
+        return Request.from_file(response, apiurl=apiurl)
diff --git a/osc/obs_api/request_action.py b/osc/obs_api/request_action.py
new file mode 100644
index 00000000..8fa6298e
--- /dev/null
+++ b/osc/obs_api/request_action.py
@@ -0,0 +1,236 @@
+import urllib.error
+
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+from .package import Package
+from .package_sources import PackageSources
+from .request_action_acceptinfo import RequestActionAcceptinfo
+from .request_action_group import RequestActionGroup
+from .request_action_grouped import RequestActionGrouped
+from .request_action_options import RequestActionOptions
+from .request_action_person import RequestActionPerson
+from .request_action_source import RequestActionSource
+from .request_action_target import RequestActionTarget
+from .request_sourcediff import RequestSourcediff
+
+
+class RequestAction(XmlModel):
+    XML_TAG = "action"
+
+    class TypeEnum(str, Enum):
+        SUBMIT = "submit"
+        DELETE = "delete"
+        CHANGE_DEVEL = "change_devel"
+        ADD_ROLE = "add_role"
+        SET_BUGOWNER = "set_bugowner"
+        MAINTENANCE_INCIDENT = "maintenance_incident"
+        MAINTENANCE_RELEASE = "maintenance_release"
+        RELEASE = "release"
+        GROUP = "group"
+
+    type: TypeEnum = Field(
+        xml_attribute=True,
+    )
+
+    source: Optional[RequestActionSource] = Field(
+    )
+
+    target: Optional[RequestActionTarget] = Field(
+    )
+
+    person: Optional[RequestActionPerson] = Field(
+    )
+
+    group: Optional[RequestActionGroup] = Field(
+    )
+
+    grouped_list: Optional[List[RequestActionGrouped]] = Field(
+        xml_name="grouped",
+    )
+
+    options: Optional[RequestActionOptions] = Field(
+    )
+
+    sourcediff: Optional[RequestSourcediff] = Field(
+    )
+
+    acceptinfo: Optional[RequestActionAcceptinfo] = Field(
+    )
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self._allow_new_attributes = True
+        # source and target always come from ``self._apiurl`` while devel and factory projects may live elsewhere
+        self._devel_apiurl = self._apiurl
+        self._factory_apiurl = self._apiurl
+        self._factory_project = "openSUSE:Factory"
+        self._props = {}
+        self._allow_new_attributes = False
+
+    def _get_package(self, package_type):
+        key = f"{package_type}_package"
+        if key not in self._props:
+            func = getattr(self, f"_get_{package_type}_apiurl_project_package")
+            apiurl, project, package = func()
+            if apiurl is None:
+                self._props[key] = None
+            else:
+                try:
+                    self._props[key] = Package.from_api(apiurl, project, package)
+                except urllib.error.HTTPError as e:
+                    if e.code != 404:
+                        raise
+                    self._props[key] = None
+        return self._props[key]
+
+    def _get_package_sources(self, package_type, *, rev=None):
+        key = f"{package_type}_package_sources"
+        if key not in self._props:
+            func = getattr(self, f"_get_{package_type}_apiurl_project_package")
+            apiurl, project, package = func()
+            if apiurl is None:
+                self._props[key] = None
+            else:
+                try:
+                    self._props[key] = PackageSources.from_api(apiurl, project, package, rev=rev)
+                except urllib.error.HTTPError as e:
+                    if e.code != 404:
+                        raise
+                    self._props[key] = None
+        return self._props[key]
+
+    def _get_source_apiurl_project_package(self):
+        return self._apiurl, self.source.project, self.source.package
+
+    @property
+    def source_package(self) -> Optional[Package]:
+        """
+        Return a ``Package`` object that encapsulates metadata of the source package.
+        """
+        return self._get_package("source")
+
+    @property
+    def source_package_sources(self) -> Optional[PackageSources]:
+        """
+        Return a ``PackageSources`` object that contains information about the ``source.rev`` revision of the source package sources in OBS SCM.
+        """
+        if self.source is None:
+            return None
+        return self._get_package_sources("source", rev=self.source.rev)
+
+    def _get_target_apiurl_project_package(self):
+        if self.target is None:
+            return None, None, None
+        target_project, target_package = self.get_actual_target_project_package()
+        return self._apiurl, target_project, target_package
+
+    @property
+    def target_package(self) -> Optional[Package]:
+        """
+        Return a ``Package`` object that encapsulates metadata of the target package.
+        """
+        return self._get_package("target")
+
+    @property
+    def target_package_sources(self) -> Optional[PackageSources]:
+        """
+        Return a ``PackageSources`` object that contains information about the current revision of the target package sources in OBS SCM.
+        """
+        return self._get_package_sources("target")
+
+    def _get_factory_apiurl_project_package(self):
+        if self.target is None:
+            # a new package was submitted, it doesn't exist on target; let's read the package name from the source
+            target_project, target_package = None, self.source.package
+        else:
+            target_project, target_package = self.get_actual_target_project_package()
+
+        if (self._apiurl, target_project) == (self._factory_apiurl, self._factory_project):
+            # factory package equals the target package
+            return None, None, None
+
+        return self._factory_apiurl, self._factory_project, target_package
+
+    @property
+    def factory_package(self) -> Optional[Package]:
+        """
+        Return a ``Package`` object that encapsulates metadata of the package in the factory project.
+        The name of the package equals the target package name.
+        """
+        return self._get_package("factory")
+
+    @property
+    def factory_package_sources(self) -> Optional[PackageSources]:
+        """
+        Return a ``PackageSources`` object that contains information about the current revision of the factory package sources in OBS SCM.
+        """
+        return self._get_package_sources("factory")
+
+    def _get_devel_apiurl_project_package(self):
+        if self.factory_package is None:
+            return None, None, None
+
+        devel = self.factory_package.devel
+        if devel is None:
+            return None, None, None
+
+        return (
+            self._devel_apiurl,
+            devel.project,
+            devel.package or self.factory_package.name,
+        )
+
+    @property
+    def devel_package(self) -> Optional[Package]:
+        """
+        Return a ``Package`` object that encapsulates metadata of the package in the devel project.
+        The devel project name and package name come from ``self.factory_package.devel``.
+        If the devel package name is not set, target package name is used.
+        """
+        return self._get_package("devel")
+
+    @property
+    def devel_package_sources(self) -> Optional[PackageSources]:
+        """
+        Return a ``PackageSources`` object that contains information about the current revision of the devel package sources in OBS SCM.
+        """
+        return self._get_package_sources("devel")
+
+    def get_actual_target_project_package(self) -> Tuple[str, str]:
+        """
+        Return the target project and package names because maintenance incidents require special handling.
+
+        The target project for maintenance incidents is virtual and cannot be queried.
+        The actual target project is specified in target's ``releaseproject`` field.
+
+        Also the target package for maintenance incidents is not set explicitly.
+        It is extracted from ``releasename`` field from the source metadata.
+        If ``releasename`` is not defined, source package name is used.
+        """
+
+        if self.type == "maintenance_incident":
+            # dmach's note on security:
+            # The ``releaseproject`` is baked into the target information in the request and that's perfectly ok.
+            # The ``releasename`` is part of the source package metadata and *may change* after the request is created.
+            # After consulting this with OBS developers, I believe this doesn't represent any security issue
+            # because the project is fixed and tampering with ``releasename`` might only lead to inconsistent naming,
+            # the package would still end up it the same project.
+
+            # target.releaseproject is always set for a maintenance_incident
+            assert self.target
+            assert self.target.releaseproject
+            project = self.target.releaseproject
+
+            # the target package is not specified
+            # we need to extract it from source package's metadata or use source package name as a fallback
+            assert self.source_package
+            if self.source_package.releasename:
+                package = self.source_package.releasename.split(".")[0]
+            else:
+                package = self.source_package.name
+
+            return project, package
+
+        assert self.target
+        assert self.target.project
+        assert self.target.package
+        return self.target.project, self.target.package
diff --git a/osc/obs_api/request_action_acceptinfo.py b/osc/obs_api/request_action_acceptinfo.py
new file mode 100644
index 00000000..7eff63fd
--- /dev/null
+++ b/osc/obs_api/request_action_acceptinfo.py
@@ -0,0 +1,33 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestActionAcceptinfo(XmlModel):
+    XML_TAG = "acceptinfo"
+
+    rev: str = Field(
+        xml_attribute=True,
+    )
+
+    srcmd5: str = Field(
+        xml_attribute=True,
+    )
+
+    osrcmd5: str = Field(
+        xml_attribute=True,
+    )
+
+    oproject: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    opackage: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    xsrcmd5: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    oxsrcmd5: Optional[str] = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_action_group.py b/osc/obs_api/request_action_group.py
new file mode 100644
index 00000000..d9620f28
--- /dev/null
+++ b/osc/obs_api/request_action_group.py
@@ -0,0 +1,13 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestActionGroup(XmlModel):
+    XML_TAG = "group"
+
+    name: str = Field(
+        xml_attribute=True,
+    )
+
+    role: Optional[str] = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_action_grouped.py b/osc/obs_api/request_action_grouped.py
new file mode 100644
index 00000000..57f56914
--- /dev/null
+++ b/osc/obs_api/request_action_grouped.py
@@ -0,0 +1,9 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestActionGrouped(XmlModel):
+    XML_TAG = "grouped"
+
+    id: str = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_action_options.py b/osc/obs_api/request_action_options.py
new file mode 100644
index 00000000..14a7b969
--- /dev/null
+++ b/osc/obs_api/request_action_options.py
@@ -0,0 +1,27 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestActionOptions(XmlModel):
+    XML_TAG = "options"
+
+    class SourceupdateEnum(str, Enum):
+        UPDATE = "update"
+        NOUPDATE = "noupdate"
+        CLEANUP = "cleanup"
+
+    sourceupdate: Optional[SourceupdateEnum] = Field(
+    )
+
+    class UpdatelinkEnum(str, Enum):
+        TRUE = "true"
+        FALSE = "false"
+
+    updatelink: Optional[UpdatelinkEnum] = Field(
+    )
+
+    class MakeoriginolderEnum(str, Enum):
+        TRUE = "true"
+        FALSE = "false"
+
+    makeoriginolder: Optional[MakeoriginolderEnum] = Field(
+    )
diff --git a/osc/obs_api/request_action_person.py b/osc/obs_api/request_action_person.py
new file mode 100644
index 00000000..2bda470c
--- /dev/null
+++ b/osc/obs_api/request_action_person.py
@@ -0,0 +1,13 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestActionPerson(XmlModel):
+    XML_TAG = "person"
+
+    name: str = Field(
+        xml_attribute=True,
+    )
+
+    role: Optional[str] = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_action_source.py b/osc/obs_api/request_action_source.py
new file mode 100644
index 00000000..67a86fbf
--- /dev/null
+++ b/osc/obs_api/request_action_source.py
@@ -0,0 +1,17 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestActionSource(XmlModel):
+    XML_TAG = "source"
+
+    project: str = Field(
+        xml_attribute=True,
+    )
+
+    package: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    rev: Optional[str] = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_action_target.py b/osc/obs_api/request_action_target.py
new file mode 100644
index 00000000..a7352f75
--- /dev/null
+++ b/osc/obs_api/request_action_target.py
@@ -0,0 +1,21 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestActionTarget(XmlModel):
+    XML_TAG = "target"
+
+    project: str = Field(
+        xml_attribute=True,
+    )
+
+    package: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    releaseproject: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    repository: Optional[str] = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_history.py b/osc/obs_api/request_history.py
new file mode 100644
index 00000000..c38d96ef
--- /dev/null
+++ b/osc/obs_api/request_history.py
@@ -0,0 +1,19 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestHistory(XmlModel):
+    XML_TAG = "history"
+
+    who: str = Field(
+        xml_attribute=True,
+    )
+
+    when: str = Field(
+        xml_attribute=True,
+    )
+
+    description: str = Field(
+    )
+
+    comment: Optional[str] = Field(
+    )
diff --git a/osc/obs_api/request_review.py b/osc/obs_api/request_review.py
new file mode 100644
index 00000000..02048f59
--- /dev/null
+++ b/osc/obs_api/request_review.py
@@ -0,0 +1,57 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+from .enums import RequestStates
+from .request_review_history import RequestReviewHistory
+
+
+class RequestReview(XmlModel):
+    XML_TAG = "review"
+
+    state: RequestStates = Field(
+        xml_attribute=True,
+    )
+
+    created: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    by_user: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    by_group: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    by_project: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    by_package: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    who: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    when: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    comment: Optional[str] = Field(
+    )
+
+    history_list: Optional[List[RequestReviewHistory]] = Field(
+        xml_name="history",
+    )
+
+    def get_user_and_type(self):
+        if self.by_user:
+            return (self.by_user, "user")
+        if self.by_group:
+            return (self.by_group, "group")
+        if self.by_package:
+            return (f"{self.by_project}/{self.by_package}", "package")
+        if self.by_project:
+            return (self.by_project, "project")
+        raise RuntimeError("Unable to determine user and its type")
diff --git a/osc/obs_api/request_review_history.py b/osc/obs_api/request_review_history.py
new file mode 100644
index 00000000..af842669
--- /dev/null
+++ b/osc/obs_api/request_review_history.py
@@ -0,0 +1,19 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestReviewHistory(XmlModel):
+    XML_TAG = "history"
+
+    who: str = Field(
+        xml_attribute=True,
+    )
+
+    when: str = Field(
+        xml_attribute=True,
+    )
+
+    description: str = Field(
+    )
+
+    comment: Optional[str] = Field(
+    )
diff --git a/osc/obs_api/request_sourcediff.py b/osc/obs_api/request_sourcediff.py
new file mode 100644
index 00000000..15618935
--- /dev/null
+++ b/osc/obs_api/request_sourcediff.py
@@ -0,0 +1,30 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+from .request_sourcediff_files_file import RequestSourcediffFilesFile
+from .request_sourcediff_issue import RequestSourcediffIssue
+from .request_sourcediff_new import RequestSourcediffNew
+from .request_sourcediff_old import RequestSourcediffOld
+
+
+class RequestSourcediff(XmlModel):
+    XML_TAG = "sourcediff"
+
+    key: str = Field(
+        xml_attribute=True,
+    )
+
+    old: Optional[RequestSourcediffOld] = Field(
+    )
+
+    new: Optional[RequestSourcediffNew] = Field(
+    )
+
+    files_list: List[RequestSourcediffFilesFile] = Field(
+        xml_name="files",
+        xml_wrapped=True,
+    )
+
+    issue_list: Optional[List[RequestSourcediffIssue]] = Field(
+        xml_name="issues",
+        xml_wrapped=True,
+        xml_item_name="issue",
+    )
diff --git a/osc/obs_api/request_sourcediff_file_diff.py b/osc/obs_api/request_sourcediff_file_diff.py
new file mode 100644
index 00000000..bca84c11
--- /dev/null
+++ b/osc/obs_api/request_sourcediff_file_diff.py
@@ -0,0 +1,13 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestSourcediffFileDiff(XmlModel):
+    XML_TAG = "diff"
+
+    lines: int = Field(
+        xml_attribute=True,
+    )
+
+    text: str = Field(
+        xml_set_text=True,
+    )
diff --git a/osc/obs_api/request_sourcediff_file_new.py b/osc/obs_api/request_sourcediff_file_new.py
new file mode 100644
index 00000000..2f8f0dca
--- /dev/null
+++ b/osc/obs_api/request_sourcediff_file_new.py
@@ -0,0 +1,17 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestSourcediffFileNew(XmlModel):
+    XML_TAG = "new"
+
+    name: str = Field(
+        xml_attribute=True,
+    )
+
+    md5: str = Field(
+        xml_attribute=True,
+    )
+
+    size: int = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_sourcediff_file_old.py b/osc/obs_api/request_sourcediff_file_old.py
new file mode 100644
index 00000000..2853dd32
--- /dev/null
+++ b/osc/obs_api/request_sourcediff_file_old.py
@@ -0,0 +1,17 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestSourcediffFileOld(XmlModel):
+    XML_TAG = "old"
+
+    name: str = Field(
+        xml_attribute=True,
+    )
+
+    md5: str = Field(
+        xml_attribute=True,
+    )
+
+    size: int = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_sourcediff_files_file.py b/osc/obs_api/request_sourcediff_files_file.py
new file mode 100644
index 00000000..ec262f87
--- /dev/null
+++ b/osc/obs_api/request_sourcediff_files_file.py
@@ -0,0 +1,21 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+from .request_sourcediff_file_diff import RequestSourcediffFileDiff
+from .request_sourcediff_file_new import RequestSourcediffFileNew
+from .request_sourcediff_file_old import RequestSourcediffFileOld
+
+
+class RequestSourcediffFilesFile(XmlModel):
+    XML_TAG = "file"
+
+    state: str = Field(
+        xml_attribute=True,
+    )
+
+    old: Optional[RequestSourcediffFileOld] = Field(
+    )
+
+    new: Optional[RequestSourcediffFileNew] = Field(
+    )
+
+    diff: RequestSourcediffFileDiff = Field(
+    )
diff --git a/osc/obs_api/request_sourcediff_issue.py b/osc/obs_api/request_sourcediff_issue.py
new file mode 100644
index 00000000..7cffa613
--- /dev/null
+++ b/osc/obs_api/request_sourcediff_issue.py
@@ -0,0 +1,25 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestSourcediffIssue(XmlModel):
+    XML_TAG = "issue"
+
+    state: str = Field(
+        xml_attribute=True,
+    )
+
+    tracker: str = Field(
+        xml_attribute=True,
+    )
+
+    name: str = Field(
+        xml_attribute=True,
+    )
+
+    label: str = Field(
+        xml_attribute=True,
+    )
+
+    url: str = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_sourcediff_new.py b/osc/obs_api/request_sourcediff_new.py
new file mode 100644
index 00000000..f996ea61
--- /dev/null
+++ b/osc/obs_api/request_sourcediff_new.py
@@ -0,0 +1,21 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestSourcediffNew(XmlModel):
+    XML_TAG = "new"
+
+    project: str = Field(
+        xml_attribute=True,
+    )
+
+    package: str = Field(
+        xml_attribute=True,
+    )
+
+    rev: str = Field(
+        xml_attribute=True,
+    )
+
+    srcmd5: str = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_sourcediff_old.py b/osc/obs_api/request_sourcediff_old.py
new file mode 100644
index 00000000..9b194348
--- /dev/null
+++ b/osc/obs_api/request_sourcediff_old.py
@@ -0,0 +1,21 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class RequestSourcediffOld(XmlModel):
+    XML_TAG = "old"
+
+    project: str = Field(
+        xml_attribute=True,
+    )
+
+    package: str = Field(
+        xml_attribute=True,
+    )
+
+    rev: str = Field(
+        xml_attribute=True,
+    )
+
+    srcmd5: str = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/obs_api/request_state.py b/osc/obs_api/request_state.py
new file mode 100644
index 00000000..c29db662
--- /dev/null
+++ b/osc/obs_api/request_state.py
@@ -0,0 +1,33 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+from .enums import RequestStates
+
+
+class RequestState(XmlModel):
+    XML_TAG = "state"
+
+    name: RequestStates = Field(
+        xml_attribute=True,
+    )
+
+    who: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    when: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    created: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    superseded_by: Optional[int] = Field(
+        xml_attribute=True,
+    )
+
+    approver: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    comment: Optional[str] = Field(
+    )
diff --git a/osc/obs_api/serviceinfo.py b/osc/obs_api/serviceinfo.py
new file mode 100644
index 00000000..70ab1a92
--- /dev/null
+++ b/osc/obs_api/serviceinfo.py
@@ -0,0 +1,21 @@
+from ..util.models import *  # pylint: disable=wildcard-import,unused-wildcard-import
+
+
+class Serviceinfo(XmlModel):
+    XML_TAG = "serviceinfo"
+
+    xsrcmd5: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    lsrcmd5: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    error: Optional[str] = Field(
+        xml_attribute=True,
+    )
+
+    code: Optional[str] = Field(
+        xml_attribute=True,
+    )
diff --git a/osc/util/models.py b/osc/util/models.py
index 7f03bacc..13d1db83 100644
--- a/osc/util/models.py
+++ b/osc/util/models.py
@@ -7,6 +7,7 @@ This module IS NOT a supported API, it is meant for osc internal use only.
 """
 
 import copy
+import functools
 import inspect
 import sys
 import tempfile
@@ -71,8 +72,9 @@ NotSet = NotSetClass()
 
 
 class FromParent(NotSetClass):
-    def __init__(self, field_name):
+    def __init__(self, field_name, *, fallback=NotSet):
         self.field_name = field_name
+        self.fallback = fallback
 
     def __repr__(self):
         return f"FromParent(field_name={self.field_name})"
@@ -256,7 +258,7 @@ class Field(property):
                 for num, i in enumerate(result):
                     if isinstance(i, dict):
                         klass = self.inner_type
-                        result[num] = klass(**i)
+                        result[num] = klass(**i, _parent=obj)
 
             if self.get_callback is not None:
                 result = self.get_callback(obj, result)
@@ -279,7 +281,10 @@ class Field(property):
 
         if isinstance(self.default, FromParent):
             if obj._parent is None:
-                raise RuntimeError(f"The field '{self.name}' has default {self.default} but the model has no parent set")
+                if self.default.fallback is not NotSet:
+                    return self.default.fallback
+                else:
+                    raise RuntimeError(f"The field '{self.name}' has default {self.default} but the model has no parent set")
             return getattr(obj._parent, self.default.field_name or self.name)
 
         if self.default is NotSet:
@@ -308,20 +313,23 @@ class Field(property):
         if self.is_model and isinstance(value, dict):
             # initialize a model instance from a dictionary
             klass = self.origin_type
-            value = klass(**value)  # pylint: disable=not-callable
+            value = klass(**value, _parent=obj)  # pylint: disable=not-callable
         elif self.is_model_list and isinstance(value, list):
             new_value = []
             for i in value:
                 if isinstance(i, dict):
                     klass = self.inner_type
-                    new_value.append(klass(**i))
+                    new_value.append(klass(**i, _parent=obj))
                 else:
+                    i._parent = obj
                     new_value.append(i)
             value = new_value
         elif self.is_model and isinstance(value, str) and hasattr(self.origin_type, "XML_TAG_FIELD"):
             klass = self.origin_type
             key = getattr(self.origin_type, "XML_TAG_FIELD")
-            value = klass(**{key: value})
+            value = klass(**{key: value}, _parent=obj)
+        elif self.is_model and value is not None:
+            value._parent = obj
 
         self.validate_type(value)
         obj._values[self.name] = value
@@ -361,6 +369,7 @@ class ModelMeta(type):
         return new_cls
 
 
+@functools.total_ordering
 class BaseModel(metaclass=ModelMeta):
     __fields__: Dict[str, Field]
 
@@ -372,6 +381,7 @@ class BaseModel(metaclass=ModelMeta):
         raise AttributeError(f"Setting attribute '{self.__class__.__name__}.{name}' is not allowed")
 
     def __init__(self, **kwargs):
+        self._allow_new_attributes = True
         self._defaults = {}  # field defaults cached in field.get()
         self._values = {}  # field values explicitly set after initializing the model
         self._parent = kwargs.pop("_parent", None)
@@ -404,10 +414,28 @@ class BaseModel(metaclass=ModelMeta):
 
         self._allow_new_attributes = False
 
+    def _get_cmp_data(self):
+        result = []
+        for name, field in self.__fields__.items():
+            if field.exclude:
+                continue
+            value = getattr(self, name)
+            if isinstance(value, dict):
+                value = sorted(list(value.items()))
+            result.append((name, value))
+        return result
+
     def __eq__(self, other):
         if type(self) != type(other):
             return False
-        return self.dict() == other.dict()
+        if self._get_cmp_data() != other._get_cmp_data():
+            print(self._get_cmp_data(), other._get_cmp_data())
+        return self._get_cmp_data() == other._get_cmp_data()
+
+    def __lt__(self, other):
+        if type(self) != type(other):
+            return False
+        return self._get_cmp_data() < other._get_cmp_data()
 
     def dict(self):
         result = {}
@@ -440,6 +468,11 @@ class BaseModel(metaclass=ModelMeta):
 class XmlModel(BaseModel):
     XML_TAG = None
 
+    _apiurl: Optional[str] = Field(
+        exclude=True,
+        default=FromParent("_apiurl", fallback=None),
+    )
+
     def to_xml(self) -> ET.Element:
         xml_tag = None
 
@@ -459,6 +492,8 @@ class XmlModel(BaseModel):
         root = ET.Element(xml_tag)
 
         for field_name, field in self.__fields__.items():
+            if field.exclude:
+                continue
             xml_attribute = field.extra.get("xml_attribute", False)
             xml_set_tag = field.extra.get("xml_set_tag", False)
             xml_set_text = field.extra.get("xml_set_text", False)
@@ -510,20 +545,20 @@ class XmlModel(BaseModel):
         return root
 
     @classmethod
-    def from_string(cls, string: str) -> "XmlModel":
+    def from_string(cls, string: str, *, apiurl: Optional[str] = None) -> "XmlModel":
         """
         Instantiate model from string.
         """
         root = ET.fromstring(string)
-        return cls.from_xml(root)
+        return cls.from_xml(root, apiurl=apiurl)
 
     @classmethod
-    def from_file(cls, file: Union[str, typing.IO]) -> "XmlModel":
+    def from_file(cls, file: Union[str, typing.IO], *, apiurl: Optional[str] = None) -> "XmlModel":
         """
         Instantiate model from file.
         """
         root = ET.parse(file).getroot()
-        return cls.from_xml(root)
+        return cls.from_xml(root, apiurl=apiurl)
 
     def to_bytes(self) -> bytes:
         """
@@ -581,7 +616,7 @@ class XmlModel(BaseModel):
             parent.remove(node)
 
     @classmethod
-    def from_xml(cls, root: ET.Element):
+    def from_xml(cls, root: ET.Element, *, apiurl: Optional[str] = None):
         """
         Instantiate model from a XML root.
         """
@@ -661,7 +696,7 @@ class XmlModel(BaseModel):
                 for node in nodes:
                     if field.is_model_list:
                         klass = field.inner_type
-                        entry = klass.from_xml(node)
+                        entry = klass.from_xml(node, apiurl=apiurl)
 
                         # clear node as it was checked in from_xml() already
                         node.text = None
@@ -691,7 +726,7 @@ class XmlModel(BaseModel):
                 if node is None:
                     continue
                 klass = field.origin_type
-                kwargs[field_name] = klass.from_xml(node)
+                kwargs[field_name] = klass.from_xml(node, apiurl=apiurl)
 
                 # clear node as it was checked in from_xml() already
                 node.text = None
@@ -707,16 +742,16 @@ class XmlModel(BaseModel):
                 continue
             value = cls.value_from_string(field, node.text)
             node.text = None
+            cls._remove_processed_node(root, node)
             if value is None:
                 if field.is_optional:
                     continue
                 value = ""
             kwargs[field_name] = value
-            cls._remove_processed_node(root, node)
 
         cls._remove_processed_node(None, root)
 
-        obj = cls(**kwargs)
+        obj = cls(**kwargs, _apiurl=apiurl)
         obj.__dict__["_root"] = orig_root
         return obj
 
@@ -760,7 +795,7 @@ class XmlModel(BaseModel):
             while True:
                 run_editor(f.name)
                 try:
-                    edited_obj = self.__class__.from_file(f.name)
+                    edited_obj = self.__class__.from_file(f.name, apiurl=self._apiurl)
                     f.seek(0)
                     edited_data = f.read()
                     break
diff --git a/tests/test_models.py b/tests/test_models.py
index 84ae542b..29d0a6a3 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -291,6 +291,49 @@ class Test(unittest.TestCase):
         self.assertEqual(c.field, "new-text")
         self.assertEqual(c.field2, "text")
 
+    def test_parent_fallback(self):
+        class SubModel(BaseModel):
+            field: str = Field(default=FromParent("field", fallback="submodel-fallback"))
+
+        class Model(BaseModel):
+            field: str = Field(default=FromParent("field", fallback="model-fallback"))
+            sub: Optional[SubModel] = Field()
+            sub_list: Optional[List[SubModel]] = Field()
+
+        m = Model()
+        s = SubModel(_parent=m)
+        m.sub = s
+        self.assertEqual(m.field, "model-fallback")
+        self.assertEqual(m.sub.field, "model-fallback")
+
+        m = Model(sub={})
+        self.assertEqual(m.field, "model-fallback")
+        self.assertEqual(m.sub.field, "model-fallback")
+
+        m = Model(sub=SubModel())
+        self.assertEqual(m.field, "model-fallback")
+        self.assertEqual(m.sub.field, "model-fallback")
+
+        m = Model()
+        s = SubModel(_parent=m)
+        m.sub_list = [s]
+        self.assertEqual(m.field, "model-fallback")
+        self.assertEqual(m.sub_list[0].field, "model-fallback")
+
+        m = Model(sub_list=[{}])
+        self.assertEqual(m.field, "model-fallback")
+        self.assertEqual(m.sub_list[0].field, "model-fallback")
+
+        m = Model(sub_list=[SubModel()])
+        self.assertEqual(m.field, "model-fallback")
+        self.assertEqual(m.sub_list[0].field, "model-fallback")
+
+        m = Model()
+        m.sub_list = []
+        m.sub_list.append({})
+        self.assertEqual(m.field, "model-fallback")
+        self.assertEqual(m.sub_list[0].field, "model-fallback")
+
     def test_get_callback(self):
         class Model(BaseModel):
             quiet: bool = Field(
@@ -352,6 +395,57 @@ class Test(unittest.TestCase):
         self.assertIsInstance(m.field[0], BaseModel)
         self.assertEqual(m.field[0].text, "value")
 
+    def test_ordering(self):
+        class TestSubmodel(BaseModel):
+            txt: Optional[str] = Field()
+
+        class TestModel(BaseModel):
+            num: Optional[int] = Field()
+            txt: Optional[str] = Field()
+            sub: Optional[TestSubmodel] = Field()
+            dct: Optional[Dict[str, TestSubmodel]] = Field()
+
+        m1 = TestModel()
+        m2 = TestModel()
+        self.assertEqual(m1, m2)
+
+        m1 = TestModel(num=1)
+        m2 = TestModel(num=2)
+        self.assertNotEqual(m1, m2)
+        self.assertLess(m1, m2)
+        self.assertGreater(m2, m1)
+
+        m1 = TestModel(txt="a")
+        m2 = TestModel(txt="b")
+        self.assertNotEqual(m1, m2)
+        self.assertLess(m1, m2)
+        self.assertGreater(m2, m1)
+
+        m1 = TestModel(sub={})
+        m2 = TestModel(sub={})
+        self.assertEqual(m1, m2)
+
+        m1 = TestModel(sub={"txt": "a"})
+        m2 = TestModel(sub={"txt": "b"})
+        self.assertNotEqual(m1, m2)
+        self.assertLess(m1, m2)
+        self.assertGreater(m2, m1)
+
+        m1 = TestModel(dct={})
+        m2 = TestModel(dct={})
+        self.assertEqual(m1, m2)
+
+        m1 = TestModel(dct={"a": TestSubmodel()})
+        m2 = TestModel(dct={"b": TestSubmodel()})
+        self.assertNotEqual(m1, m2)
+        self.assertLess(m1, m2)
+        self.assertGreater(m2, m1)
+
+        # dict ordering doesn't matter
+        m1 = TestModel(dct={"a": TestSubmodel(), "b": TestSubmodel()})
+        m2 = TestModel(dct={"b": TestSubmodel(), "a": TestSubmodel()})
+        self.assertEqual(m1, m2)
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/tests/test_models_xmlmodel.py b/tests/test_models_xmlmodel.py
index 36f3942b..665db5e2 100644
--- a/tests/test_models_xmlmodel.py
+++ b/tests/test_models_xmlmodel.py
@@ -1,3 +1,4 @@
+import io
 import textwrap
 import unittest
 
@@ -149,6 +150,41 @@ class TestXmlModel(unittest.TestCase):
         m = ParentModel.from_string(expected)
         self.assertEqual(m.to_string(), expected)
 
+    def test_apiurl(self):
+        class ChildModel(XmlModel):
+            XML_TAG = "child"
+            value: str = Field()
+
+        class ParentModel(XmlModel):
+            XML_TAG = "parent"
+            text: str = Field()
+            child: List[ChildModel] = Field(xml_wrapped=True, xml_name="children")
+
+        # serialize the model and load it with apiurl set
+        m = ParentModel(text="TEXT", child=[{"value": "FOO"}, {"value": "BAR"}])
+        xml = m.to_string()
+
+        apiurl = "https://api.example.com"
+
+        m = ParentModel.from_string(xml, apiurl=apiurl)
+        m.child.append({"value": "BAZ"})
+
+        self.assertEqual(m._apiurl, apiurl)
+        self.assertEqual(m.child[0]._apiurl, apiurl)
+        self.assertEqual(m.child[1]._apiurl, apiurl)
+        self.assertEqual(m.child[2]._apiurl, apiurl)
+
+        # test the same as above but with a file
+        f = io.StringIO(xml)
+
+        m = ParentModel.from_file(f, apiurl=apiurl)
+        m.child.append({"value": "BAZ"})
+
+        self.assertEqual(m._apiurl, apiurl)
+        self.assertEqual(m.child[0]._apiurl, apiurl)
+        self.assertEqual(m.child[1]._apiurl, apiurl)
+        self.assertEqual(m.child[2]._apiurl, apiurl)
+
 
 if __name__ == "__main__":
     unittest.main()