Chapter 20. XML
WHAT'S IN THIS CHAPTER?
Making F# work with XML
Using Linq to XML with F#
Understanding how F# and DOM work together
Applying active patterns for XML parsing
XML is a fact of life for most software developers, regardless of language. It is found everywhere, from configuration files holding nothing but a small number of settings, to the giant stores of weather data provided in XML format by the National Oceanic and Atmospheric Administration of the United States. Although history will judge whether having all this XML was a good idea, the fact remains that it's there. Love it or hate it, developers have to deal with it.
In this chapter, you learn how to use F# with XML processing tools such as those found in the
System.Xml namespace in the .NET framework. This chapter covers techniques that simplify most XML processing tasks. Special attention is provided to demonstrate how you can use things such as XPath and active patterns to simplify the task of processing and transforming XML.
Boiled down to its essence, most things that deal with XML do the following:
Read XML, typically to store it in some sort of language representation
Query the XML, often again to extract parts of it into some sort of language representation
Process the XML, sometimes to produce more XML or to generate some side effect
Persist the XML, so that other programs can join in the fun of working with XML
For more details on the various W3C standards that make up the XML grammar and suite of specifications, ...