Help:$smwgSparqlQFeatures

is a configuration parameter that is used to define the SPARQL query features that are expected to be supported by the repository of the identifier (graph) of the SPARQL database. The configuration parameter was introduced in .CiteRef::gh:smw:467 introduced the   constant as configurable setting.CiteRef::gh:smw:2429

Default setting
The default setting means that the SPARQL database supports finding redirects using inverse property paths as well as resolving subproperties and subcategories.

Available options

 * − Sets that the SPARQL database does not support any features as required by SPARQL 1.1 (e.g. Virtuoso 6.1 or 4Store Current: May 2015)
 *   − Sets that the SPARQL database supports finding redirects using inverse property paths (can only be used for repositories with full SPARQL 1.1 support (e.g. Fuseki or Sesame Current: May 2015)
 *   − Sets that the SPARQL database supports resolving subproperties
 *   − Sets that the SPARQL database supports resolving resolve subcategories
 * − Sets that the SPARQL database supports the sorting collation as maintained in . It is not enabled by default as the  collation generates a UTF-8 string that contains unrecognized UTF codepoints that may not be understood by the back-end hence the collator prevents and armors those unrecognized characters by replacing them with a ? to avoid a cURL communication failure. Of course this means that not all elements of the sort string can be transfered to the back-end and can therefore cause a sorting distortion for close matches as in case of for example "Ennis, Ennis Hill, Ennis Jones, Ennis-Hill, Ennis-London".

Changing the default setting
To modify the setting to this configuration parameter, add one of the following lines to your "LocalSettings.php" file after the  call:

This means that a repository provider may be used that does not fully support SPARQL 1.1.
 * Cater for repository providers that do not fully support SPARQL 1.1

or alternatively remove the option from the existing definition of the configuration parameter like e.g.
 * Disable the finding of redirects using inverse property paths

or alternatively add the option to the existing definition of the configuration parameter like e.g.
 * Enable the sorting collation as maintained