The PBDOM_COMMENT class represents a DOM comment node within an XML document. The PBDOM_COMMENT class is derived from the PBDOM_CHARACTERDATA class.
The PBDOM_COMMENT class has no methods that are not inherited from PBDOM_OBJECT or PBDOM_CHARACTERDATA.
Comments are useful for annotating parts of an XML document with user-readable information.
When a document is parsed, any comments found within the document persist in memory as part of the DOM tree. A PBDOM_COMMENT created at runtime also becomes part of the DOM tree.
An XML comment does not usually form part of the content model of a document. The presence or absence of comments has no effect on a document's validity, and there is no requirement that comments be declared in a DTD.
