SAXMethods: Generic Methods for SAX callbacks

In XML: Tools for Parsing and Generating XML Within R and S-Plus

Generic Methods for SAX callbacks

Description

This is a collection of generic functions for which one can write methods so that they are called in repsonse to different SAX events. The idea is that one defines methods for different classes of the .state argument and dispatch to different methods based on that argument. The functions represent the different SAX events.

Usage

startElement.SAX(name, atts, .state = NULL)
endElement.SAX(name, .state = NULL)
comment.SAX(content, .state = NULL)
processingInstruction.SAX(target, content, .state = NULL)
text.SAX(content, .state = NULL)
entityDeclaration.SAX(name, base, sysId, publicId, notationName,  .state = NULL)
.InitSAXMethods(where = "package:XML")

Arguments

name	the name of the XML element or entity being declared
atts	named character vector of XML attributes
content	the value/string in the processing instruction or comment
target	the target of the processing instruction, e.g. the R in <?R....>
base	x
sysId	the system identifier for this entity
publicId	the public identifier for the entity
notationName	name of the notation specification
.state	the state object on which the user-defined methods should dispatch.
where	the package in which the class and method definitions should be defined. This is almost always unspecified.

Value

Each method should return the (potentially modified) state value.

Note

This no longer requires the Expat XML parser to be installed. Instead, we use libxml's SAX parser.

Author(s)

Duncan Temple Lang

References

https://www.w3.org/XML/, http://www.xmlsoft.org

See Also

xmlEventParse

XML documentation built on June 25, 2024, 5:06 p.m.