Does it all ("ODD") is a literate programming language for XML schemas. In literate-programming style, ODD documents combine human-readable documentation and machine-readable models using the Documentation Elements module of the Text Encoding Initiative. Tools generate localised and internationalised HTML, ePub, or PDF human-readable output and DTDs, W3C XML Schema, Relax NG Compact Syntax, or Relax NG XML Syntax machine-readable output. The Roma web application is built around the ODD format and can use it to generate schemas in DTD, W3C XML Schema, Relax NG Compact Syntax, or Relax NG XML Syntax formats, as used by many XML validation tools and services. ODD is the format used internally by the Text Encoding Initiative for the TEI technical standard. Although ODD files generally describe the difference between a customized XML format and the full TEI model, ODD also can be used to describe XML formats that are entirely separate from the TEI. One example of this is the W3C's Internationalization Tag Set which uses the ODD format to generate schemas and document its vocabulary. TEI customizations TEI customizations are specializations of the TEI XML specification for use in particular fields or by specific communities. EpiDoc (Epigraphic Documents) Charters Encoding Initiative Medieval Nordic Text Archive (Menota) Customization in the TEI is done through the ODD mechanism mentioned above. In truth since its P5 version, all so-called 'TEI Conformant' uses of the TEI Guidelines are based on a TEI customization documented in a TEI ODD file. Even when users choose one of the off-the-shelf pre-generated schemas to validate against, these have been created from freely available customization files. Projects The format is used by many projects worldwide. Practically all projects are associated with one or more universities. Some well-known projects that encode texts using TEI include: History Prior to the creation of TEI, humanities scholars had no common standards for encoding electronic texts in a manner that would serve their academic goals (Hockey 1993, p. 41). In 1987, a group of scholars representing fields in humanities, linguistics, and computing convened at Vassar College to put forth a set of guidelines known as the “Poughkeepsie Principles”. These guidelines directed the development of the first TEI standard, "P1". 1987 – Work started by the Association for Computers and the Humanities, the Association for Computational Linguistics, and the Association for Literary and Linguistic Computing on what would become the TEI. This culminated in the Closing statement of