With such an avalanche of queries, you'd think our priority would be to answer as many as possible.
Let's start with one of the most basic facts about using parsers: Unless you happen to be developing XML-processing software, you can pretty much forget about this question. But it's not really a question to concern yourself with if you're just interested in browsing XML, editing it, or creating style sheets.
Welcome to Expat, a stream-oriented XML parser library written in C.
Classes are provided for parsing, generating, manipulating, and validating XML documents.
XML:: Xerces is faithful to the XML 1.0 recommendation and associated standards (DOM levels 1, 2, and 3, SAX 1 and 2, Namespaces, and W3C XML Schema).
ALE aggregates and sorts read events from devices and composes an XML document for a generic engine to interpret and execute.
The client application allows creation and local storage of event cycle specifications, interaction with the ALE Engine using a browser, and reception of event cycle reports from the ALE Engine.
The parser provides high performance, modularity, and scalability, and provides full support for Unicode.