MediaWiki:Apihelp-templatedata-param-doNotIgnoreMissingTitles
Return data about titles even if they are missing or lack TemplateData. By default (for backwards compatibility) titles are only returned if they exist and have TemplateData.
Return data about titles even if they are missing or lack TemplateData. By default (for backwards compatibility) titles are only returned if they exist and have TemplateData.