XML: dtdIsAttribute – R documentation

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dtdIsAttribute

Query if a name is a valid attribute of a DTD element.

Description

Examines the definition of the DTD element definition identified by element to see if it supports an attribute named name.

Usage

dtdIsAttribute(name, element, dtd)

Arguments

`name`	The name of the attribute being queried
`element`	The name of the element whose definition is to be used to obtain the list of valid attributes.
`dtd`	The DTD containing the definition of the elements, specifically `element`.

Value

A logical value indicating if the list of attributes suppported by the specified element has an entry named name. This does indicate what type of value that attribute has, whether it is required, implied, fixed, etc.

Author(s)

Duncan Temple Lang

References

http://www.w3.org/XML/, http://www.jclark.com/xml/, http://www.omegahat.net

Examples

dtdFile <- system.file("exampleData", "foo.dtd", package="XML")
 foo.dtd <- parseDTD(dtdFile)

    # true
  dtdIsAttribute("numRecords", "dataset", foo.dtd)

    # false
  dtdIsAttribute("date", "dataset", foo.dtd)

XML

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

v3.99-0.10

BSD_3_clause + file LICENSE

Authors

CRAN Team [ctb, cre] (de facto maintainer since 2013), Duncan Temple Lang [aut] (<https://orcid.org/0000-0003-0159-1546>), Tomas Kalibera [ctb]

Initial release