The Text Encoding Initiative (TEI) Guidelines is an international and interdisciplinary standard that enables libraries, museums, publishers, and individual scholars to represent a variety of literary and linguistic texts for online research, teaching, and preservation.
A file is considered to be a TEI P4 document when either of the following occurs:
The DTD schema used for these documents is located in ${frameworks}/tei/tei2xml.dtd, where ${frameworks} is a subdirectory of the Oxygen XML Author install directory.
The CSS file used for rendering TEI P4 content is located in ${frameworks}/tei/xml/tei/css/tei_oxygen.css.
There are two default catalogs for TEI P4 document type: