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OBS-URL: https://build.opensuse.org/request/show/440001
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/xapian-core?expand=0&rev=24
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Dominique Leuenberger 2016-11-14 19:10:24 +00:00 committed by Git OBS Bridge
commit 61eb2bf754
6 changed files with 102 additions and 22 deletions
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3
xapian-core-1.4.0.tar.xz
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xapian-core.changes
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-------------------------------------------------------------------
Fri Nov 11 10:02:34 UTC 2016 - alarrosa@suse.com
- Update to 1.4.1
* Constructing a Query for a non-reference counted PostingSource object will
now try to clone the PostingSource object (as happened in 1.3.4 and
earlier). This clone code was removed as part of the changes in 1.3.5 to
support optional reference counting of PostingSource objects, but that breaks
the case when the PostingSource object is on the stack and goes out of scope
before the Query object is used. Issue reported by Till Schäfer and analysed
by Daniel Vrátil in a bug report against Akonadi:
https://bugs.kde.org/show_bug.cgi?id=363741
* Add BM25PlusWeight class implementing the BM25+ weighting scheme, implemented
by Vivek Pal (https://github.com/xapian/xapian/pull/104).
* Add PL2PlusWeight class implementing the PL2+ weighting scheme, implemented
by Vivek Pal (https://github.com/xapian/xapian/pull/108).
* LMWeight: Implement Dir+ weighting scheme as DIRICHLET_PLUS_SMOOTHING.
Patch from Vivek Pal.
* Add CoordWeight class implementing coordinate matching. This can be useful
for specialised uses - e.g. to implement sorting by the number of matching
filters.
* DLHWeight,DPHWeight,PL2Weight: With these weighting schemes, the formulae
can give a negative weight contribution for a term in extreme cases. We
used to try to handle this by calculating a per-term lower bound on the
contribution and subtracting this from the contribution, but this idea
is fundamentally flawed as the total offset it adds to a document depends on
what combination of terms that document matches, meaning in general the
offset isn't the same for every matching document. So instead we now clamp
each term's weight contribution to be >= 0.
* TfIdfWeight: Always scale term weight by wqf - this seems the logical
approach as it matches the weighting we'd get if we weighted every non-unique
term in the query, as well as being explicit in the Piv+ formula.
* Fix OP_SCALE_WEIGHT to work with all weighting schemes - previously it was
ignored when using PL2Weight and LMWeight.
* PL2Weight: Greatly improve upper bound on weight:
+ Split the weight equation into two parts and maximise each separately as
that gives an easily solvable problem, and in common cases the maximum is
at the same value of wdfn for both parts. In a simple test, the upper
bounds are now just over double the highest weight actually achieved -
previously they were several hundred times. This approach was suggested by
Aarsh Shah in: https://github.com/xapian/xapian/pull/48
+ Improve upper bound on normalised wdf (wdfn) - when wdf_upper_bound >
doclength_lower_bound, we get a tighter bound by evaluating at
wdf=wdf_upper_bound. In a simple test, this reduces the upper bound on
wdfn by 36-64%, and the upper bound on the weight by 9-33%.
* PL2Weight: Fix calculation of upper_bound when P2>0. P2 is typically
negative, but for a very common term it can be positive and then we should
use wdfn_lower not wdfn_upper to adjust P_max.
* Weight::unserialise(): Check serialised form is empty when unserialising
parameter-free schemes BoolWeight, DLHWeight and DPHWeight.
* TermGenerator::set_stopper_strategy(): New method to control how the Stopper
object is used. Patch from Arnav Jain.
* QueryParser: Fix handling of CJK query over multiple prefixes. Previously
all the n-gram terms were AND-ed together - now we AND together for each
prefix, then OR the results. Fixes #719, reported by Aaron Li.
* Add Database::get_revision() method which provides access to the database
revision number for chert and glass, intended for use by xapiand. Marked
as experimental, so we don't have to go through the usual deprecation cycle
if this proves not to be the approach we want to take. Fixes #709,
reported by German M. Bravo.
* Mark RangeProcessor constructor as `explicit`.
* See also https://xapian.org/docs/xapian-core-1.4.1/NEWS
- A compiler with support for C++11 is required, so
specify BuildRequires gcc-c++ >= 4.6
-------------------------------------------------------------------
Sat Jul 9 06:25:35 UTC 2016 - tittiatcoke@gmail.com

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xapian-core.spec
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Name: xapian-core
Version: 1.4.0
Version: 1.4.1
Release: 0
Summary: The Xapian Probabilistic Information Retrieval Library
License: GPL-2.0
@ -29,7 +29,7 @@ Source2: %{name}.keyring
Source3: baselibs.conf
BuildRequires: automake
BuildRequires: fdupes
BuildRequires: gcc-c++
BuildRequires: gcc-c++ >= 4.6
BuildRequires: libuuid-devel
BuildRequires: pkg-config
BuildRequires: xz