Complete supported list of search parameters

Is there a list or a document that I can reference for a full list of supported search parameters, modifiers, etc.?

Haven’t seen one GSDL. About all you can do is add a search parameter using the drop-down section, and note what is printed in the Search Query field.

Is there something specific you wanted to do?

It would be nice if I could enter a REGEX rule as a search query.