If you don't change the active editor and you don't switch to other application, the schema
associated to the current document is parsed and cached by the first Validate
Document action and is reused by the next actions without re-parsing it. This
increases the speed of the validate actions if the schema is large or is located on a remote
server on the Web. To reset the cache and re-parse the schema you have to use the
Reset Cache and
Validate action. This action will also re-parse the catalogs and reset the
schema used for content completion.