Doctype-class {XML} | R Documentation

## Class to describe a reference to an XML DTD

### Description

This class is intended to identify a DTD by SYSTEM file and/or PUBLIC catalog identifier. This is used in the DOCTYPE element of an XML document.

### Objects from the Class

Objects can be created by calls to the constructor function `Doctype`.

### Slots

`name`:
  Object of class `"character"`. This is the name of the top-level element in the XML document.
`system`:
  Object of class `"character"`. This is the name of the file on the system where the DTD document can be found. Can this be a URI?
`public`:
  Object of class `"character"`. This gives the PUBLIC identifier for the DTD that can be searched for in a catalog, for example to map the DTD reference to a local system element.

### Methods

There is a constructor function and also methods for `coerce` to convert an object of this class to a character.

### Author(s)

Duncan Temple Lang

### References

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

### See Also

`Doctype` `saveXML`

### Examples

      d = Doctype(name = "section", public = c("-//OASIS//DTD DocBook XML V4.2//EN", "http://oasis-open.org/docbook/xml/4.2/docbookx.dtd"))

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