This function appends the directory specified by dir to the set tagtemplatepath option if not already present. If prepend is 1, prepends dir to the tagtemplatepath path, removing any later occurrence of the directory.

If there is an Arbortext-path\custom\tagtemplates subdirectory at startup, the custom\tagtemplates path is automatically prepended to the tag template path.

You can put custom tag templates you want associated with a particular document type into a custom\doctypes\doctype\tagtemplates directory or in the original location of the document type's doctype\tagtemplates directory.

Putting your tag template files in the custom\tagtemplates subdirectory makes them automatically available, avoiding manual steps to add them to the path.