In comparison with everything that's gone before, this sectionis practically a no-brainer. The properties discussed herein are sostraightforward, and the complexities so minimal, that this willprobably all come as a great relief. First we'll talk aboutfont-style, and then move on tofont-variant before wrapping up the fontproperties.
disc | circle | square | decimal | upper-alpha | lower-alpha | upper-roman | lower-roman | none
By not predefining any tags in the XML Recommendation, the W3C allowed developers full control over customizing their data as they see fit. This makes XML very attractive to encoding data that already exists in legacy databases (by using database metadata, and other schema information). This extensibility of XML makes it such a great fit when trying to get different systems to work with each other.
Since the structure of the XML document can be specified in DTDs they provide a simple way to make it easier to exchange XML documents that conform to a DTD. For example, if two software systems need to exchange information, then if both of the systems conform to one DTD, the two systems can process information from each other. DTDs are not as powerful as some kind of schema architecture for XML, they don't support typing, subclassing, or instantiation mechanisms that a schema architecture must have.
DTDs are a simple way to make sure that 2 or more XML documents are of the same "type". Its a very limited approach to making "typed" XML documents shareable across systems. In the future some kind of schema system will be proposed by the W3C that should allow typing, instantiation and inheritance of information (in XML).
overflow-clip: rect(-0.25in, auto, auto, -0.25in);

This doesn't do much good, as you can see. The clippingrectangle extends up and to the left, but since there isn't anycontent there, the visual effect is the same as if the author haddeclared overflow-clip: auto.