Hi! I would like to propose a new tool that would be very useful in order to have a good overview of the items about a specific topic.
So, I'll try to describe it: the user would have to input a category item (es. Category:Ancient Greece (Q7215882), Category:Italy (Q1410903) ...) and a depth (es. 1, 2 ...); given these inputs, the tool should give a list of all the items containing at least one sitelink which is in a category that is a sitelink of the category item. Resume: A is the category item, B(a) are the categories which are sitelinks of A, C(B(a)) are all the articles cointained in B(a). Possible filters: by type of project (all projects; only Wikipedias; only Wikisources ...); by the date of the articles' creation. The main idea, however, is the possibility to explore at the same time all the articles belonging to a category which is common to two or more projects: this would be immensely useful (e.g., these Petscan lists would be unified into 2 or 3)! In my opinion, the best option would be integrating this function into Petscan, but is may also be an indipendent tool.
Tell me if I haven't been clear enough. Thank you!