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XML documents may be stored in files or databases. When stored in files, XML documents are simply plain text files with tags (and possibly DTDs). It is very easy to save your XML documents to a text file and pass the text file around to other machines, platforms and programs (as long as they can understand the data). In the worst case scenario, XML documents (files) can be viewed in a text editor on just about any platform.
XML documents are also naturally committed to a database (relational or object) or any other kind of XML document store. There are commercial products available which allow you to save XML documents to an XML storage layer (which is not a database per se), like Datachannel's XStore and ODI's eXcelon. These XML store solutions are quite expensive ($10,000 to $20,000 range).
XML documents are also quite naturally retrieved from a persistence layer (databases, file systems, XML stores). This lends XML to be used in real world applications where the information being used by different parts of a system is the most important thing.
<P CLASS="driving directions" >This is a side note (and it's green).</P>
If you aren't quite so concerned about exact matching, you canstring class selectors together. This is a new feature of CSS2, andwith this approach, you can match a classattribute with a value of drivingdirections in this way:
Again, this probably seems a bit easier to type. So why go to all theeffort of using the longer notation of attribute selectors? Thereason to use attribute selectors is that the
If you resize the browser window the image jumps around as the lines re-wrap.
8. A floating element must be placed as high aspossible.