Probably the most widely used and frequently referenced TEI customization is tei_lite, a subset of some fifty elements claiming to satisfy the needs of 90% of TEI users, as evidenced by their actual practice in creating digital texts. This was originally produced for a TEI training workshop back in 1997, but with some updating has continued to be useful in a very wide range of contexts, to the extent that some people think that it is the TEI schema.TEI Lite is included (as an Exemplar) with the standard release of TEI, in source and derived forms.