The tags URL parameter accepts a space-delimited set of tags to prefill in the form. As an example, check the link in the last question of the Data Explorer FAQ which has a URL like: http://meta.stackexchange.com/questions/ask?tags=data-explorer


No. Generally speaking, no ids are unique across sites. There are some situations where they line up (like linked meta user ids to their parent site user ids), or places where an id series is shared within a site (question_id and answer_id won't collide on Stack Overflow, for example); but these are basically implementation details, unless called out in ...

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