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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>xmllint</title><meta name="generator" content="DocBook XSL Stylesheets V1.61.2"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="id2876302"></a><div class="titlepage"><div></div><div></div></div><div class="refnamediv"><h2>Name</h2>xmllint &#8212; command line XML tool</div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><tt class="command">xmllint</tt> [[--version] | [--debug] | [--shell] | [--debugent] | [--copy] | [--recover] | [--noent] | [--noout] | [--nonet] | [--htmlout] | [--nowrap] | [--valid] | [--postvalid] | [--dtdvalid <tt>URL</tt>] | [--dtdvalidfpi <tt>FPI</tt>] | [--timing] | [--output <tt>file</tt>] | [--repeat] | [--insert] | [--compress] | [--html] | [--xmlout] | [--push] | [--memory] | [--maxmem <tt>nbbytes</tt>] | [--nowarning] | [--noblanks] | [--nocdata] | [--format] | [--encode <tt>encoding</tt>] | [--dropdtd] | [--nsclean] | [--testIO] | [--catalogs] | [--nocatalogs] | [--auto] | [--xinclude] | [--noxincludenode] | [--loaddtd] | [--dtdattr] | [--stream] | [--walker] | [--pattern <tt>patternvalue</tt>] | [--chkregister] | [--relaxng] | [--schema] | [--c14n]] [<tt class="option"><tt>xmlfile</tt></tt>]</div></div><div class="refsect1" lang="en"><a name="introduction"></a><h2>Introduction</h2>
 The xmllint program parses one or more XML files, specified on the
 command line as <tt>xmlfile</tt>. It prints various
 types of output, depending upon the options selected. It is useful for
 detecting errors both in XML code and in the
 XML parser itself.
 
 It is included in libxml2.
 </div><div class="refsect1" lang="en"><a name="options"></a><h2>Options</h2><div class="variablelist"><dl><dt><tt class="option">--version</tt></dt><dd>
	 Display the version of
	 libxml2 used.
	 </dd><dt><tt class="option">--debug</tt></dt><dd>
	 Parse a file and output an annotated tree of the
	 in-memory version of the document.
	 </dd><dt><tt class="option">--shell</tt></dt><dd>
	 Run a navigating shell. Details on available commands in shell mode
	 are below.
	 </dd><dt><tt class="option">--debugent</tt></dt><dd>
	 Debug the entities defined in the document.
	 </dd><dt><tt class="option">--copy</tt> </dt><dd>
	 Test the internal copy implementation.
	 </dd><dt><tt class="option">--recover</tt></dt><dd>
	 Output any parsable portions of an invalid
	 document.
	 </dd><dt><tt class="option">--noent</tt></dt><dd>
	 Substitute entity values for entity
	 references. By default, xmllint leaves entity
	 references in place.
	 </dd><dt><tt class="option">--nocdata</tt></dt><dd>
	 Substitute CDATA section by equivalent text nodes.
	 </dd><dt><tt class="option">--nsclean</tt></dt><dd>
	 Remove redundant namespace declarations.
	 </dd><dt><tt class="option">--noout</tt></dt><dd>
	 Suppress output. By default,
	 xmllint outputs the result tree.
	 </dd><dt><tt class="option">--htmlout</tt></dt><dd>
	 Output results as an HTML
	 file. This causes xmllint to output
	 the necessary HTML tags surrounding the result tree
	 output so the results can be displayed in a browser. 
	 </dd><dt><tt class="option">--nowrap </tt></dt><dd>
	 Do not output HTML doc wrapper.
	 </dd><dt><tt class="option">--valid </tt></dt><dd>
	 Determine if the document is a valid instance
	 of the included Document Type Definition (DTD). A
	 DTD to be validated against also can be specified at
	 the command line using the <tt class="option">--dtdvalid</tt> option. By default,
	 xmllint also checks to determine if the
	 document is well-formed.
	 </dd><dt><tt class="option">--postvalid</tt></dt><dd>
	 Validate after parsing is completed.
	 </dd><dt> <tt class="option">--dtdvalid</tt> <tt>URL</tt></dt><dd>
	 Use the
 DTD specified by <tt>URL</tt> for
 validation.
	 </dd><dt> <tt class="option">--dtdvalidfpi</tt> <tt>FPI</tt></dt><dd>
	 Use the
 DTD specified by the Public Identifier
 <tt>FPI</tt> for validation, note that this
 will require a Catalog exporting that Public Identifier to work.
	 </dd><dt><tt class="option">--timing</tt></dt><dd>
	 Output information about the time it takes
	 xmllint to perform the various steps.
	 </dd><dt><tt class="option">--output</tt> <tt>file</tt></dt><dd>Define a file path where xmllint will save the result of
	 parsing. Usually the programs build a tree and save it on stdout, with
	 this option the result XML instance will be saved onto a file.</dd><dt><tt class="option">--repeat</tt></dt><dd>
	 Repeat 100 times, for timing or profiling.
	 </dd><dt><tt class="option">--insert</tt></dt><dd>
	 Test for valid insertions.
	 </dd><dt><tt class="option">--compress</tt></dt><dd>
	 Turn on gzip compression of output.
	 </dd><dt><tt class="option">--html</tt></dt><dd>
	 Use the HTML parser.
	 </dd><dt><tt class="option">--xmlout</tt></dt><dd>Used in conjunction with <tt class="option">--html</tt>. Usually
 when HTML is parsed the document is saved with the HTML serializer, but with
 this option the resulting document is saved with the XML serializer. This is
 primarily used to generate XHTML from HTML input.</dd><dt><tt class="option">--push</tt></dt><dd>
	 Use the push mode of the parser.
	 </dd><dt><tt class="option">--memory</tt></dt><dd>
	 Parse from memory.
	 </dd><dt><tt class="option">--maxmem</tt> <tt>nnbytes</tt></dt><dd>Test the parser memory
 support. <tt>nnbytes</tt> is the maximum number of bytes the
 library is allowed to allocate. This can also be used to make sure batch
 processing of XML files will not exhaust the virtual memory of the server
 running them.</dd><dt><tt class="option">--nowarning</tt></dt><dd>
	 Do not emit warnings from the parser and/or validator.
	 </dd><dt><tt class="option">--noblanks</tt></dt><dd>
	 Drop ignorable blank spaces.
	 </dd><dt><tt class="option">--format</tt></dt><dd>
	 Reformat and reindent the output. The $XMLLINT_INDENT
	 environment variable controls the indentation (default 
	 value is two spaces " ").
	 </dd><dt><tt class="option">--testIO</tt></dt><dd>
	 Test user input/output support.
	 </dd><dt><tt class="option">--encode</tt> <tt>encoding</tt></dt><dd>
	 Output in the given encoding.
	 </dd><dt><tt class="option">--catalogs</tt></dt><dd>
	 Use the catalogs from $SGML_CATALOG_FILES. Otherwise /etc/xml/catalog
	 is used by default.
	 </dd><dt><tt class="option">--nocatalogs</tt></dt><dd>
	 Do not use any catalogs.
	 </dd><dt><tt class="option">--auto</tt></dt><dd>
	 Generate a small document for testing purposes.
	 </dd><dt><tt class="option">--xinclude</tt></dt><dd>
	 Do XInclude processing.
	 </dd><dt><tt class="option">--noxincludenode</tt></dt><dd>
	 Do XInclude processing but do not generate XInclude start and end
	 nodes.
	 </dd><dt><tt class="option">--loaddtd</tt></dt><dd>
	 Fetch external DTD.
	 </dd><dt><tt class="option">--dtdattr</tt></dt><dd>
	 Fetch external DTD and populate the tree with inherited attributes.
	 </dd><dt><tt class="option">--dropdtd</tt></dt><dd>
	 Remove DTD from output.
	 </dd><dt><tt class="option">--stream</tt></dt><dd>Use streaming API - useful when used in combination with
 --relaxng or --valid options for validation of files that are
	 too large to be held in memory.</dd><dt><tt class="option">--walker</tt></dt><dd>Test the walker module, which is a reader interface but for a
 document tree, instead of using the reader API on an unparsed document it
 works on a existing in-memory tree. Used in debugging.</dd><dt><tt class="option">--chkregister</tt></dt><dd>Turn on node registration. Useful for developers testing
	 libxml2 node tracking code.</dd><dt><tt class="option">--pattern</tt> <tt>patternvalue</tt></dt><dd>Used to exercise the pattern recognition engine, which can be
	 used with the reader interface to the parser. It allows to select some
	 nodes in the document based on an XPath (subset) expression. Used for
	 debugging.</dd><dt><tt class="option">--relaxng</tt> <tt>schema</tt></dt><dd>Use RelaxNG file named <tt>schema</tt> for
	 validation.</dd><dt><tt class="option">--schema</tt> <tt>schema</tt></dt><dd>Use a W3C XML Schema file named <tt>schema</tt> for validation.</dd><dt>
 <tt class="option">--c14n</tt></dt><dd>Use the W3C XML Canonicalisation (C14N) to
serialize the result of parsing to stdout. It keeps comments in
the result.</dd></dl></div></div><div class="refsect1" lang="en"><a name="shell"></a><h2>Shell</h2>
 xmllint offers an interactive shell mode
 invoked with the <tt class="option">--shell</tt> command. Available commands in
 shell mode include:
 <div class="variablelist"><dl><dt><tt class="option">base</tt></dt><dd>
	 display XML base of the node
	 </dd><dt><tt class="option">bye</tt></dt><dd>
	 leave shell
	 </dd><dt><tt class="option">cat <tt>node</tt></tt></dt><dd>
	 Display node if given or current node.
	 </dd><dt><tt class="option">cd <tt>path</tt></tt></dt><dd>
	 Change the current node to <tt>path</tt> (if given
	 and unique) or root if no argument given.
	 </dd><dt><tt class="option">dir <tt>path</tt></tt></dt><dd>
	 Dumps information about the node (namespace, attributes, content).
	 </dd><dt><tt class="option">du <tt>path</tt></tt></dt><dd>
	 Show the structure of the subtree under path or the current node.
	 </dd><dt><tt class="option">exit</tt></dt><dd>
	 Leave the shell.
	 </dd><dt><tt class="option">help</tt></dt><dd>
	 Show this help.
	 </dd><dt><tt class="option">free</tt></dt><dd>
	 Display memory usage.
	 </dd><dt><tt class="option">load <tt>name</tt></tt></dt><dd>
	 Load a new document with the given name.
	 </dd><dt><tt class="option">ls <tt>path</tt></tt></dt><dd>
	 List contents of <tt>path</tt> (if given) or the
	 current directory.
	 </dd><dt><tt class="option">pwd</tt></dt><dd>
	 Display the path to the current node.
	 </dd><dt><tt class="option">quit</tt></dt><dd>
	 Leave the shell.
	 </dd><dt><tt class="option">save <tt>name</tt></tt></dt><dd>
	 Saves the current document to <tt>name</tt> if
	 given or to the original name.
	 </dd><dt><tt class="option">validate</tt></dt><dd>
	 Check the document for error.
	 </dd><dt><tt class="option">write <tt>name</tt></tt></dt><dd>
	 Write the current node to the given filename.
	 </dd></dl></div></div><div class="refsect1" lang="en"><h2>Catalogs</h2>Catalog behavior can be changed by redirecting
 queries to the user's own set of catalogs. This can be done by setting the
 <tt class="varname">XML_CATALOG_FILES</tt> environment variable to a list of
 catalogs. An empty one should deactivate loading the default
 <tt class="filename">/etc/xml/catalog</tt> default catalog.</div><div class="refsect1" lang="en"><h2>Debugging Catalogs</h2>Setting the environment variable <tt class="varname">XML_DEBUG_CATALOG</tt>
 using the command "export XML_DEBUG_CATALOG="
 outputs debugging information related to catalog operations.</div><div class="refsect1" lang="en"><h2>Error Return Codes</h2>On the completion of execution, Xmllint
 returns the following error codes:<div class="variablelist"><dl><dt>0</dt><dd>No error</dd><dt>1</dt><dd>Unclassified</dd><dt>2</dt><dd>Error in DTD</dd><dt>3</dt><dd>Validation error</dd><dt>4</dt><dd>Validation error</dd><dt>5</dt><dd>Error in schema compilation</dd><dt>6</dt><dd>Error writing output</dd><dt>7</dt><dd>Error in pattern (generated when
	 [--pattern] option is used)</dd><dt>8</dt><dd>Error in Reader registration (generated when
	 [--chkregister] option is used)</dd><dt>9</dt><dd>Out of memory error</dd></dl></div></div></div></body></html>

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