The Comic Metadata (CoMet) Format is an effort to standardize the representation of information used to describe comic books and reduce barriers to the proliferation of related content. Interested parties can read the specification document.
Title continuity is handled differently depending on where you look. ComicBookDB.com lists three different “Issue 1” for Fantastic Four (1961, 1982, 1996). cbdb.com lists one issue from 1961, and no mention of issue 1 from the new “volumes” of later years.
In addition, the syntax used between systems is not consistent. One system may have fields that are granular in natures (e.g. “letterer” as a refinement of “artist”). Another system may only refer to general “contributor” with no distinction between “artist” or “writer”, and yet another may not offer the field at all.