Checking XML Well-Formedness


require 'rexml/document'
def valid_xml?(xml)
 begin
   REXML::Document.new(xml)
 rescue REXML::ParseException
   # Return nil if an exception is thrown
 end
end

bad_xml = %{
<tasks>
 <pending>
   <entry>G</entry>
 <done>
   <entry>D</entry>
</tasks>}

valid_xml?(bad_xml)                                     # => nil

good_xml = %{
<groceries>
 <bread>W</bread>
 <bread>Q</bread>
</groceries>}

doc = valid_xml?(good_xml)

Related examples in the same category

1.	REXML is already part of Ruby, you get it free of charge.
2.	A basic demonstration of parsing an XML file looking for certain elements:
3.	Use rexml to read xml file
4.	Get the first element under root
5.	Output xml with REXML
6.	Extracting Data While Parsing a Document
7.	get a Node from xml document
8.	Extracting Data From a Document's Tree Structure
9.	Entity Substituter
10.	Assign new value to node
11.	Creating and Modifying XML Documents
12.	Add new element
13.	Compressing Whitespace in an XML Document
14.	Compress whitespace only in anchor
15.	Leave whitespace for anchor
16.	Compress new line character
17.	require 'rexml/document'

Checking XML Well-Formedness : rexml « XML « Ruby

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