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# Semantic MediaWiki 2.1
Released on January 19th, 2015.
## Highlights
### Support for semantic queries in Special:Search
This release adds support for semantic queries run directly from MediaWiki's standard search. You
can enable this feature by setting `$wgSearchType` to ["SMWSearch"](https://semantic-mediawiki.org/wiki/Help:SMWSearch).
The related configuration parameter [``$smwgFallbackSearchType``](https://semantic-mediawiki.org/wiki/Help:$smwgFallbackSearchType)
allows specifying which search engine to fall back to in case "SMWSearch" returns no results. (#450, #496, #505)
### SPARQLStore improvements
The SPARQLStore now supports concept queries (#696) and regex like queries (`[[Url::~http://*query=*]] OR [[Url::~*ccc*]]`) for Page and URL values (#679).
Notable performance improvements and many other fixes (can be found in the bug fix list) have been
made to broaden the SPARQLStore support.
### Enhanced platform support
SMW has partially supported PostgreSQL for a long time. This new release brings SMW's PostgreSQL
support to the same level as MySQL and SQLite, making it the third fully supported relational database.
HHVM (HipHop Virtual Machine) 3.3 or above is now supported along with all previously supported PHP
versions.
Although earlier versions of SMW probably work with MediaWiki 1.24, this new release officially
supports it.
## New features
* #546 Concepts can now be nested (bug 15316)
* #537 Modernized [`Special:SearchByProperty`](https://semantic-mediawiki.org/wiki/Help:Special:Search_by_property) interface
* #613 Added `subobject` parameter to the `BrowseBySubject` API module and imporved resolving of circular redirects
* #620 Added `--page` as export option to the [`dumpRDF.php`](https://semantic-mediawiki.org/wiki/Help:DumpRDF.php) maintenance script
* #633 Made ouput decoding for uri's human readable (bug 35452)
* #643 Added `--runtime` option to [`rebuildData.php`](https://semantic-mediawiki.org/wiki/Help:RebuildData.php). It allows you to see how much time was spend and how much memory was used.
* #659 Added [``$smwgEnabledEditPageHelp``](https://semantic-mediawiki.org/wiki/Help:$smwgEnabledEditPageHelp) option that enables showing a contextual help text on the edit page
* #664 Enabled semicolon escaping for record-type values (`\;`) (bug T17732)
* #672 Added `Special:Log` support for events enabled in `smwgLogEventTypes`
## Bug fixes
* #500 Fixed the `SPAPRQLStore` to return a `FalseCondition` instead of an exception for not supported data types (e.g `Geo`)
* #520 Fixed the `SPAPRQLStore` query selection for subobjects used with a namespace condition
* #543 Removes invalid category value links to `SearchByProperty` on `Special:Browse` (bug 33449)
* #537 Fixed parameter encoding in `Special:SearchByProperty` for hyphens and spaces (bug 16150)
* #554 Enhanced concept pages to provide time and date of the last update
* #566 Fixed the `SPARQLStore` query result display for moved pages (a.k.a. "gost" pages)
* #601 Fixed movability for predefined property pages
* #615 Fixed data display inconsistency for pre-existing redirects
* #617 Fixed circular `UpdateJob` caused by redirects
* #619 Fixed exception in `dumpRDF.php` caused by resolving a subobject for a redirect
* #622 Fixed cache id mismatch for redirects in `SQLStore`
* #622 Fixed exception for when a `null` is returned by `ExportController::getSemanticData`
* #627 Enhanced `SPARQLStore` XML result parser to support `Virtuoso` singelton response
* #618 Fixed subobject disjunctive/conjunctive subquery handling
* #628 Fixed named subobject encoding in the `Exporter` to support accented characters
* #630 Fixed browse link generation for wikipages in `Special:Browse`
* #638 Fixed the hard-coded upper bound for the offset option of an inline query by replacing it with configuration parameter [```$smwgQUpperbound```](https://semantic-mediawiki.org/wiki/Help:$smwgQUpperbound)
* #638 Fixed `postgres` temporary table generation issue (bug 34855, #455, #462)
* #640 Fixed `QueryProcessor` to allow query conditions to contain `=` (bug 32955)
* #641 Removes service info links from the `Factbox`
* #654 Fixed broken field detection in record-type caused by html encoded strings (bug T23926)
* #656 Fixed `#REDIRECT` detection in MW 1.24+
* #661 Fixed regex search `(~/!)` for page-type property values (bug T36665, T49073, T33151, T35854)
* #674 Fixed regex search support for uri-type property values
* #683 Fixed invalid `:smw-redi` marker when `#REDIRECT` is removed manually
* #694 Fixed probable race condition for `SQLStore`(`postgres`) when creating temporary tables
* #702 Fixed http header in `SPARQLStore` to be Sesame complaint
## Internal changes
* #486 Added continuous integration support for for `Jena Fuseki` 1.1.1
* #487, #576, #600 Added an internal cache to improve `SPARQLStore` redirect and export lookup performance
* #512, #521 Added benchmark tests for different components such as job-queue, maintenance script, queries etc.
* #523 Disabled the Factbox display for a `delete action` and re-enable the Factbox for an undeleted page
* #532 Added `UrlEncoder` to recognize all special characters when creating a manual link to `Special:Browse`
* #534 Added a value hash to `SQLStore::fetchSemanticData` to ensure that only distinct values are displayed
* #557 Added `SMW::Store::BeforeQueryResultLookupComplete` and `SMW::Store::AfterQueryResultLookupComplete` hook
* #590, #596 Added `CompoundConditionBuilder` and `ConditionBuilderStrategyFinder` to the `SPARQLStore`
* #645 Added `RedirectInfoStore` to isolate access to redirect information and cache info requests
* #646 Improved error message handling for the `_num` data type
* #665 Replaced arbitrary DB access in `Store::updateData` with `PageUpdater::doPurgeParserCache`
* #667 Added `Database::beginTransaction` and `Database::commitTransaction`
* #670 Added `SMW::SQLStore::BeforeChangeTitleComplete` hook
* #673 Extended `DataValueFactory` to ignore `$wgCapitalLinks` settings for the property namespace
* #678 Added `PropertyRegistry` to remove global state from `DIProperty`
* #668 Changed `SQLStore` `iw` table field specification from `VARCHAR(32) binary` to `VARBINARY(32)`
* #707 Added continuous integration support for `openrdf-sesame` 2.7.14
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