Extension:SemanticQueryComposer

The SemanticQueryComposer extension implement a special page to compose a compatible   query. It allows to build identification keys for plants, animals or any other kind of things. You should order your SMW objects and properties like the following:
 * 1) If You build an identification key wiki for plants, for snalls and for car types:
 * 2) Collect your pages in Plants, Snalls and Cartypes category
 * 3) Collect properties of plants in Category:Properties of plants as subcategory of Category:Plants
 * 4) Collect properties of snalls in Category:Properties of snalls as subcategory of Category:Snalls
 * 5) Collect properties of plants in Category:Properties of cartypes as subcategory of Category:Cartypes

Usage
Call if you want to allow a query builder interface to identifying plants by added properties and propertyvalues.

Grouping properties
will create a link to a form (Special:SemanticQueryComposer) that collects Your properties as HTML select elements with all added property values as options. You can group these elements as wiki sections if You create subcategories in Your Category:Properties of plants category. E.g.:
 * Properties of flower
 * Properties of leaf
 * etc.

Installation
To install this extension, add the following line to Your : require_once( "$IP/extensions/SemanticQueryComposer/SpecialSemanticQueryComposer.php" );

Configuration parameters
If You want to hide the error and warning messages use $wgSQCDisplayErrorMessages = false; in Your LocalSettings.php.

Dependencies
You should use the following extensions:
 * Semantic MediaWiki
 * Semantic Query Form Tool

Similar solution
You can use Special:RunQuery provided by Semantic Forms.

Bugs, issues, questions and requests
User_talk:Pipi69e