Core Library Tags
To use the Info*Engine tags, include the taglib directive, which identifies the tag library and provides a prefix for uniquely identifying the tags on the page. For example, to use the core Info*Engine tags and identify them by the ie prefix, include the following directive:
<%@ taglib uri="http://www.ptc.com/infoengine/taglib/core"
prefix="ie" %>
The syntax for the tag assumes that you have specified the ie prefix in the taglib directive. If you specify a different prefix, use the prefix you specified in place of ie in the tag syntax.