Editing XLink (section)

====METS====
The [[Metadata Encoding and Transmission Standard]], supported and maintained by the [[Library of Congress]] for describing file aggregations, uses simple XLinks in pointing to file locations as well as linkbases which describe relationships among external files (though these restrict <code>to</code> and <code>from</code> attributes to type IDREF instead of NMTOKEN).<ref>{{citation |url=https://www.loc.gov/standards/mets/METSOverview.v2.html |title=METS: An Overview & Tutorial |publisher=Library of Congress}}</ref><ref>{{citation |url=https://www.loc.gov/standards/mets/METS%20Documentation%20final%20070930%20msw.pdf |title=Metadata Encoding and Transmission Standard: Primer and Reference Manual |publisher=Library of Congress |date=September 2007 |pages=133}}</ref>