While the list of formats used in the lexicographic community is unfortunately very long, there exists a de- facto standard which has been used widely in many digital humanities projects, in numerous lexicographic projects and most of the ACDH’s lexicographic endeavours: the Guidelines of the Text Encoding Initiative (TEI). The application of digital (de-facto) standards in building digital language resources is of particular concern when we think about interoperability and re-usability of resources. The buzz-word of open life-cycles for research data will remain meaningless unless researchers succeed in achieving a certain degree of harmonisation in structuring their data and meta data. The ACDH has been working on specialised schemata based on the TEI (P5) dictionary module for quite some time. In all these efforts, they have also aimed at a high degree of interoperability with the ISO standard <ref xmlns="http://www.tei-c.org/ns/1.0" target="http://www.lexicalmarkupframework.org/">LMF</ref> (Lexical Markup Framework). In order to realise mechanisms for cross-dictionary access, they have also been working with semantic technologies such as RDF and SKOS.