crossoverfic | DISCUSSION: Acceptable Postings/Stories (Reply)

I have a question for further discussion of all community members. When considering the requirements and description of this group, how are we defining crossovers? Should crossovers be considered only across different fandoms (for example Buffy the Vampire Slayer and Star Trek), or even similiar/shared/spin-off fandoms (Buffy and Angel, Stargate SG-1 and Stargate: Atlantis)

. . .

I realize that this is a fine line to walk, because while there might be argument for why Buffy the Vampire Slayer/Angel is not a crossover, there could be argument for why something such as Star Trek: TNG and Star Trek: Voyager or Stargate SG-1/Stargate: Atlantis can be considered crossovers.

So, I'm leaving this for community discussion. Be nice, be polite, and keep it civil.