Template:Trait table vars/doc

This template is used in a Semantic MediaWiki query on trait tables to load the trait information into variables as follows:


 * All trait page names for regular character traits are added to, separated by commas to allow them to be processed by #listmap.
 * For each required trait, a variable named trait page name - species is set to required.
 * For each optional trait, a variable named trait page name - species is set to optional.

This approach allows the species-trait mapping to be acquired in a single query, which is much faster than the previous approach.