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xmllint

XML parser and linter that supports XPath, a syntax for navigating XML trees.

More information.

• Return all nodes (tags) named "foo":

xmllint --xpath "//{foo}" {source_file.xml}

• Return the contents of the first node named "foo" as a string:

xmllint --xpath "string(//{foo})" {source_file.xml}

• Return the href attribute of the second anchor element in an HTML file:

xmllint --html --xpath "string(//a[2]/@href)" webpage.xhtml

• Return human-readable (indented) XML from file:

xmllint --format {source_file.xml}

• Check that an XML file meets the requirements of its DOCTYPE declaration:

xmllint --valid {source_file.xml}

• Validate XML against DTD schema hosted online:

xmllint --dtdvalid {URL} {source_file.xml}

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