English: Intentionally empty templates used as tags. Useful for invisibly tagging images or categories which then can be intersected with CatScan. The templates should be protected in order so they remain empty.
This template is empty: it does not take any inputs and does not produce any output. It is used for invisibly tagging pages which then can be intersected with other tags or categories using CatScan tools or database queries. It is meant to be used in similar way as hidden maintenance category, except that it is even more hidden. This template should be protected so it remains empty.
It is intended for tracking license templates, and looking for files missing them. Only valid license templates, and files using them, should transclude it. Uses:
CatScan2 query to find files uploaded in last 7 days without a license.
CatScan2 query to find files tagged with {{No license since}} template, that have a license (which might or might not be valid)
It is intended for tracking infobox templates, and looking for files missing them and was used to create Category:Media missing infobox template. Only valid infobox templates, and files using them, should transclude it. Usage:
this CatScan2 query will find new uploads without infobox templates.
Incompatible with {{PD-old}} licenses which require person to be dead for 70 years. Added 5 year margin of error. Use CanScan2 to find all the files using creator templates of authors who died less than 70 years ago and incorrectly using {{PD-old}} license.
Used to add images to creator templates. For example, use CatScan2 to find all the creator templates without images used within files which are in the Category:Self-portraits.
In case this image is a self portrait and one of the authors has a creator template with no image, but this image depicts the other author, than this tag added to an image will exclude it from the results of the query in the line above.