If you want to apply two template parameters such as:
Template1:
<PARAM NAME="template" VALUE=":shortname:_test">
Template2:
<PARAM NAME="template" VALUE=":regex=[^a-zA-Z0-9_\\-\\.]:_:">
Then use "|" to chain template operators such as:
<PARAM NAME="template" VALUE=":shortname:_test|:regex=[^a-zA-Z0-9_\\-\\.]:_:">