letters directory for your transcriptions.tei/templates/letter-template.xml.TEI’s xml:id).Use the Epsilon letters schema in your TEI letter transcriptions:
<?xml-model href="https://raw.githubusercontent.com/cambridge-collection/epsilon-submission-toolbox/main/tei/rng/letters.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
<?xml-model href="https://raw.githubusercontent.com/cambridge-collection/epsilon-submission-toolbox/main/tei/rng/letters.rng" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>