What does a non validating xml parser do

05-Nov-2017 04:46

As I describe elsewhere, XPath has its own hoops with regard to namespaces.

But for everything else (including new code using XPath), namespace-aware parsing should be your default.

Saxonica recommends use of the Xerces parser from Apache in preference to the version bundled in the JDK, which is known to have some serious bugs.

By default, Saxon invokes the parser in non-validating mode (that is, without requested DTD validation).

Let's dive right into code: "); Document Builder Factory dbf = Document Builder Instance(); Document Builder db = Document Builder(); Document dom = db.parse(new Input Source(xml)); println("root element name = " Document Element()Node Name()); And that's all you need to parse a simple XML string.

However, chances are good that you're not parsing simple literal strings, so read on …

A DTD describes the organization and content of an XML document in a form similar to Backus-Naur notation: a tree structure in which each element specifies the elements that it may contain (potentially none), and the order in which they must appear.Note however, that the parser still needs to read the DTD if one is present, because it may contain entity definitions that need to be expanded.DTD validation can be requested using on the command line, or equivalent API or configuration options.Even within an organization, XML data formats can undergo revision, and you may need to handle “version 1” data differently than “version 2.” attributes and does the right thing.Except for one small problem: the Namespace spec was introduced in 1999, while the DOM level 1 spec was released in 1998 and knew nothing of namespaces.

A DTD describes the organization and content of an XML document in a form similar to Backus-Naur notation: a tree structure in which each element specifies the elements that it may contain (potentially none), and the order in which they must appear.

Note however, that the parser still needs to read the DTD if one is present, because it may contain entity definitions that need to be expanded.

DTD validation can be requested using on the command line, or equivalent API or configuration options.

Even within an organization, XML data formats can undergo revision, and you may need to handle “version 1” data differently than “version 2.” attributes and does the right thing.

Except for one small problem: the Namespace spec was introduced in 1999, while the DOM level 1 spec was released in 1998 and knew nothing of namespaces.

There are two terms applied to XML documents that sound the same but have very different meanings: “well-formed” and “valid.” A document is well-formed if it can be parsed by a parser: all the opening elements have corresponding closing elements, text content has been properly escaped, the encoding is correct, and so on.