Oren Bochman wrote:
Each project has its own criteria of Notability, since it requires its
own noise
filter.
As far as I understand, WikiData is about any item, not only about things that have an article in en.Wikipedia or any other Wikipedia. The question "What items may be included in WikiData" should be added to the WikiData
FAQ. I can think of a very broad definition: every thinkable thing or object can be included as item with its own page in WikiData if the thing is topic of an article in Wikipedia or in any other Wikimedia project (e.g. Wiktionary or Wikisource) or if the thing is referenced in any of this articles. This includes for example:
- normal Wikipedia articles of any language - things that are included as items in a list-of-X-article - words (Wiktionary) - digital objects (Commons) - single pages from digitized books (Wikisource) - publications used as references
Managing the vast number of items will only be possible with backlinks, for instance you can get the list of Wikidata items linked to or used in some selected Wikipedia article and you can get a list of items not used in any article for cleanup.
Jakob