At this point you can get a very brief insight into some of the work of the GEO group by reading one of the available tutorials. As we try to explain how to use Web technologies, we tend to find areas that have not been well explained in the past, and whose implementation may even still be unclear.

Language declarations, for all their apparent simplicity, lead to this type of work. After a good deal of thought and discussion, we have produced material that emphasizes, for example, that there are two very different aspects to declaring language.

1. declaring the text-processing language, and
2. declaring the primary language metadata for a document.

To read more, please follow this link to the tutorial titled Declaring Language in XHTML and HTML.