wulftone/note.dtd

## note.dtd
<!ELEMENT note (to,from,heading,body)>
<!ELEMENT to (#PCDATA)>
<!ELEMENT from (#PCDATA)>
<!ELEMENT heading (#PCDATA)>
<!ELEMENT body (#PCDATA)>

## note.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE note SYSTEM "note.dtd">

<note>
  <to>Tove</to>
  <from>Jani</from>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
</note>

## note.xsd
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

<xs:element name="note">
  <xs:complexType>
    <xs:sequence>
      <xs:element name="to" type="xs:string"/>
      <xs:element name="from" type="xs:string"/>
      <xs:element name="heading" type="xs:string"/>
      <xs:element name="body" type="xs:string"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>

</xs:schema>

## validate-xml
#!/usr/bin/env ruby
# encoding: utf-8

# Ensure you have the libxml gem installed:
#   gem install 'libxml-ruby'
#
# Use this file as follows:
#   ruby validate-xml "path/to/my/file.xml" "path/to/my/file.dtd"
#
# For example, if this file and your xml and dtd files are in the same directory:
#   ruby validate-xml "file.xml" "file.dtd"
#
# It will throw an error if there is something wrong, read the error carefully.
# If nothing is wrong, it'll give you a happy message!
#
# Bonus points, if you're using linux/mac, you should be able to omit the "ruby" portion
# of the command by making this file executable, like so:
#   chmod +x validate-xml
#
# then you can just use it like this:
#   ./validate-xml "path/to/my/file.xml" "path/to/my/file.dtd"
#
# or like this (note that it uses an xsd file):
#   ./validate-xml "path/to/my/file.xml" "path/to/my/file.xsd"
#
# NOTE: if you have the xmllint program on your computer, you don't need this!
#   xmllint

require 'libxml'
include LibXML

schema_filename = ARGV.pop
doc = XML::Document.file ARGV.pop

result = if schema_filename.end_with? "dtd"

  schema = XML::Dtd.new File.read(schema_filename)
  doc.validate schema

else

  schema = LibXML::XML::Schema.new(schema_filename)
  result = doc.validate_schema(schema) do |message,flag|
    log.debug(message)
    puts message
  end

end

puts "No errors, yay!" if result
	<!ELEMENT note (to,from,heading,body)>
	<!ELEMENT to (#PCDATA)>
	<!ELEMENT from (#PCDATA)>
	<!ELEMENT heading (#PCDATA)>
	<!ELEMENT body (#PCDATA)>
	<?xml version="1.0" encoding="ISO-8859-1"?>
	<!DOCTYPE note SYSTEM "note.dtd">

	<note>
	<to>Tove</to>
	<from>Jani</from>
	<heading>Reminder</heading>
	<body>Don't forget me this weekend!</body>
	</note>
	<?xml version="1.0"?>
	<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

	<xs:element name="note">
	<xs:complexType>
	<xs:sequence>
	<xs:element name="to" type="xs:string"/>
	<xs:element name="from" type="xs:string"/>
	<xs:element name="heading" type="xs:string"/>
	<xs:element name="body" type="xs:string"/>
	</xs:sequence>
	</xs:complexType>
	</xs:element>

	</xs:schema>
	#!/usr/bin/env ruby
	# encoding: utf-8

	# Ensure you have the libxml gem installed:
	# gem install 'libxml-ruby'
	#
	# Use this file as follows:
	# ruby validate-xml "path/to/my/file.xml" "path/to/my/file.dtd"
	#
	# For example, if this file and your xml and dtd files are in the same directory:
	# ruby validate-xml "file.xml" "file.dtd"
	#
	# It will throw an error if there is something wrong, read the error carefully.
	# If nothing is wrong, it'll give you a happy message!
	#
	# Bonus points, if you're using linux/mac, you should be able to omit the "ruby" portion
	# of the command by making this file executable, like so:
	# chmod +x validate-xml
	#
	# then you can just use it like this:
	# ./validate-xml "path/to/my/file.xml" "path/to/my/file.dtd"
	#
	# or like this (note that it uses an xsd file):
	# ./validate-xml "path/to/my/file.xml" "path/to/my/file.xsd"
	#
	# NOTE: if you have the xmllint program on your computer, you don't need this!
	# xmllint

	require 'libxml'
	include LibXML

	schema_filename = ARGV.pop
	doc = XML::Document.file ARGV.pop

	result = if schema_filename.end_with? "dtd"

	schema = XML::Dtd.new File.read(schema_filename)
	doc.validate schema

	else

	schema = LibXML::XML::Schema.new(schema_filename)
	result = doc.validate_schema(schema) do \|message,flag\|
	log.debug(message)
	puts message
	end

	end

	puts "No errors, yay!" if result