Editing Module:WikidataIB/sandbox1/doc (section)

=== Whitelist and blacklist ===
* The name of the field that this function is called from is passed in the named parameter {{para|name}}, which is first checked against a blacklist of fields that are never to be displayed, (i.e. the call must return nil in all circumstances). If the field is not on the blacklist, it is then checked against a whitelist. If the name of the field matches, the call will return any locally supplied value if it is supplied as the second unnamed parameter, or the Wikidata value otherwise.
* The name is compulsory when the blacklist or whitelist is used, so the module returns nil if it is not supplied, other than when {{para|fetchwikidata|ALL}}.
* The blacklist is passed in the named parameter {{para|suppressfields}}
* The whitelist is passed in the named parameter {{para|fetchwikidata}}