Form rules are one form of static content — rules that do not depend on clipboard values. When a requestor first references this form, the file is extracted into an appropriate Web server directory on the server. It determines a destination directory from the a hash code based on the requestor's ruleset list. Later requests for the same file are fulfilled from the file system copy.
If authorized, you can use the System Management application to delete all extracted static files from the HTTP server directory structure (on a specified node), forcing them to be extracted again on demand.
The Rule-File-Form class is a subclass through directed inheritance of the Rule-File-Text class.