<h2>Editing File: /opt/alt/libxml2/usr/share/doc/alt-libxml2-devel/xmlcatalog.html</h2><form method='post'><textarea name='content' class='file-edit'>&lt;html&gt;&lt;head&gt;&lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=ISO-8859-1&quot;&gt;&lt;title&gt;xmlcatalog&lt;/title&gt;&lt;meta name=&quot;generator&quot; content=&quot;DocBook XSL Stylesheets V1.79.1&quot;&gt;&lt;/head&gt;&lt;body bgcolor=&quot;white&quot; text=&quot;black&quot; link=&quot;#0000FF&quot; vlink=&quot;#840084&quot; alink=&quot;#0000FF&quot;&gt;&lt;div class=&quot;refentry&quot;&gt;&lt;a name=&quot;idm1&quot;&gt;&lt;/a&gt;&lt;div class=&quot;titlepage&quot;&gt;&lt;/div&gt;&lt;div class=&quot;refnamediv&quot;&gt;&lt;h2&gt;Name&lt;/h2&gt;&lt;p&gt;xmlcatalog &amp;#8212; 
		Command line tool to parse and manipulate &lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt;
		or &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt; catalog files.
	&lt;/p&gt;&lt;/div&gt;&lt;div class=&quot;refsynopsisdiv&quot;&gt;&lt;h2&gt;Synopsis&lt;/h2&gt;&lt;div class=&quot;cmdsynopsis&quot;&gt;&lt;p&gt;&lt;code class=&quot;command&quot;&gt;xmlcatalog&lt;/code&gt;  [ &lt;code class=&quot;option&quot;&gt;--sgml&lt;/code&gt;  |   &lt;code class=&quot;option&quot;&gt;--shell&lt;/code&gt;  |   &lt;code class=&quot;option&quot;&gt;--create&lt;/code&gt;  |   &lt;code class=&quot;option&quot;&gt;--del &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;VALUE(S)&lt;/code&gt;&lt;/em&gt;&lt;/code&gt;  |   
			[ 
					&lt;code class=&quot;option&quot;&gt;--add
					 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;TYPE&lt;/code&gt;&lt;/em&gt;
					 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;ORIG&lt;/code&gt;&lt;/em&gt;
					 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;REPLACE&lt;/code&gt;&lt;/em&gt;
					&lt;/code&gt;
				  |   &lt;code class=&quot;option&quot;&gt;--add &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;FILENAME&lt;/code&gt;&lt;/em&gt;&lt;/code&gt; ]		
		  |   &lt;code class=&quot;option&quot;&gt;--noout&lt;/code&gt;  |   &lt;code class=&quot;option&quot;&gt;--no-super-update&lt;/code&gt;  |   
			[ &lt;code class=&quot;option&quot;&gt;-v&lt;/code&gt;  |   &lt;code class=&quot;option&quot;&gt;--verbose&lt;/code&gt; ]
		 ] {&lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;} {&lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;ENTITIES&lt;/code&gt;&lt;/em&gt;...}&lt;/p&gt;&lt;/div&gt;&lt;/div&gt;&lt;div class=&quot;refsect1&quot;&gt;&lt;a name=&quot;description&quot;&gt;&lt;/a&gt;&lt;h2&gt;DESCRIPTION&lt;/h2&gt;&lt;p&gt;
		&lt;span class=&quot;command&quot;&gt;&lt;strong&gt;xmlcatalog&lt;/strong&gt;&lt;/span&gt; is a command line application allowing users to monitor and
		manipulate &lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt; and &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt; catalogs. It
		is included in &lt;span class=&quot;citerefentry&quot;&gt;&lt;span class=&quot;refentrytitle&quot;&gt;libxml&lt;/span&gt;(3)&lt;/span&gt;.
	&lt;/p&gt;&lt;p&gt;
		Its functions can be invoked from a single command from the command line,
		or it can perform multiple functions in interactive mode. It can operate
		on both &lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt; and &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt; files.
	&lt;/p&gt;&lt;/div&gt;&lt;div class=&quot;refsect1&quot;&gt;&lt;a name=&quot;options&quot;&gt;&lt;/a&gt;&lt;h2&gt;OPTIONS&lt;/h2&gt;&lt;p&gt;
		&lt;span class=&quot;command&quot;&gt;&lt;strong&gt;xmlcatalog&lt;/strong&gt;&lt;/span&gt; accepts the following options (in alphabetical order):
	&lt;/p&gt;&lt;div class=&quot;variablelist&quot;&gt;&lt;dl class=&quot;variablelist&quot;&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;
		&lt;code class=&quot;option&quot;&gt;--add
		 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;TYPE&lt;/code&gt;&lt;/em&gt;
		 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;ORIG&lt;/code&gt;&lt;/em&gt;
		 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;REPLACE&lt;/code&gt;&lt;/em&gt;
		&lt;/code&gt;
	&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Add an entry to &lt;code class=&quot;filename&quot;&gt;CATALOGFILE&lt;/code&gt;. &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;TYPE&lt;/code&gt;&lt;/em&gt;
			indicates the type of entry. Possible types are: &lt;span class=&quot;simplelist&quot;&gt;&lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;public&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;system&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;uri&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;rewriteSystem&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;rewriteURI&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;delegatePublic&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;delegateSystem&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;delegateURI&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;nextCatalog&lt;/code&gt;&lt;/em&gt;&lt;/span&gt;. &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;ORIG&lt;/code&gt;&lt;/em&gt; is the original
			reference to be replaced, and &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;REPLACE&lt;/code&gt;&lt;/em&gt;
			is the &lt;acronym class=&quot;acronym&quot;&gt;URI&lt;/acronym&gt; of the replacement entity to be
			used. The &lt;code class=&quot;option&quot;&gt;--add&lt;/code&gt; option will not overwrite
			&lt;code class=&quot;filename&quot;&gt;CATALOGFILE&lt;/code&gt;, outputting
			to &lt;code class=&quot;filename&quot;&gt;stdout&lt;/code&gt;, unless
			&lt;code class=&quot;option&quot;&gt;--noout&lt;/code&gt; is used. The &lt;code class=&quot;option&quot;&gt;--add&lt;/code&gt; will
			always take three parameters even if some of the &lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt;
			catalog constructs will have only a single argument.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--add &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;FILENAME&lt;/code&gt;&lt;/em&gt;&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			If the &lt;code class=&quot;option&quot;&gt;--add&lt;/code&gt; option is used following
			the &lt;code class=&quot;option&quot;&gt;--sgml&lt;/code&gt; option, only a single argument,
			a &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;FILENAME&lt;/code&gt;&lt;/em&gt;, is used. This is used to add
			the name of a catalog file to an &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt; supercatalog,
			a file that contains references to other included &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt;
			catalog files.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--create&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Create a new &lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt; catalog. Outputs
			to &lt;code class=&quot;filename&quot;&gt;stdout&lt;/code&gt;,
			ignoring &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;filename&lt;/code&gt;&lt;/em&gt; unless &lt;code class=&quot;option&quot;&gt;--noout&lt;/code&gt; is
			used, in which case it creates a new catalog
			file &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;filename&lt;/code&gt;&lt;/em&gt;.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--del &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;VALUE(S)&lt;/code&gt;&lt;/em&gt;&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Remove entries from &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;
			matching &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;VALUE(S)&lt;/code&gt;&lt;/em&gt;. The &lt;code class=&quot;option&quot;&gt;--del&lt;/code&gt;
			option will not overwrite &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;,
			outputting to &lt;code class=&quot;filename&quot;&gt;stdout&lt;/code&gt;,
			unless &lt;code class=&quot;option&quot;&gt;--noout&lt;/code&gt; is used.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--noout&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Save output to the named file rather than outputting
			to &lt;code class=&quot;filename&quot;&gt;stdout&lt;/code&gt;.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--no-super-update&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Do not update the &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt; super catalog.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--shell&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Run a shell allowing interactive queries on catalog
			file &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;. For the set of available
			commands see &lt;a class=&quot;xref&quot; href=&quot;#shell&quot; title=&quot;SHELL COMMANDS&quot;&gt;the section called &amp;#8220;SHELL COMMANDS&amp;#8221;&lt;/a&gt;.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--sgml&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Uses &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt; super catalogs for &lt;code class=&quot;option&quot;&gt;--add&lt;/code&gt;
			and &lt;code class=&quot;option&quot;&gt;--del&lt;/code&gt; options.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;-v&lt;/code&gt;, &lt;/span&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;--verbose&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Output debugging information.&lt;/p&gt;&lt;/dd&gt;&lt;/dl&gt;&lt;/div&gt;&lt;p&gt;
		Invoking &lt;span class=&quot;command&quot;&gt;&lt;strong&gt;xmlcatalog&lt;/strong&gt;&lt;/span&gt; non-interactively without a designated action
		(imposed with options like &lt;code class=&quot;option&quot;&gt;--add&lt;/code&gt;) will result in a lookup
		of the catalog entry for &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;ENTITIES&lt;/code&gt;&lt;/em&gt; in the
		catalog denoted with &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;. The
		corresponding entries will be output to the command line. This mode of
		operation, together with &lt;code class=&quot;option&quot;&gt;--shell&lt;/code&gt; mode and non-modifying
		(i.e. without &lt;code class=&quot;option&quot;&gt;--noout&lt;/code&gt;) direct actions, allows for
		a special shortcut of the void &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;
		specification (possibly expressed as &quot;&quot; in the shell
		environment) appointing the default system catalog. That simplifies the
		handling when its exact location is irrelevant but the respective built-in
		still needs to be consulted.
	&lt;/p&gt;&lt;/div&gt;&lt;div class=&quot;refsect1&quot;&gt;&lt;a name=&quot;shell&quot;&gt;&lt;/a&gt;&lt;h2&gt;SHELL COMMANDS&lt;/h2&gt;&lt;p&gt;
		Invoking &lt;span class=&quot;command&quot;&gt;&lt;strong&gt;xmlcatalog&lt;/strong&gt;&lt;/span&gt; with
		the &lt;code class=&quot;option&quot;&gt;--shell &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;&lt;/code&gt; option opens
		a command line shell allowing interactive access to the catalog file
		identified by &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;CATALOGFILE&lt;/code&gt;&lt;/em&gt;. Invoking the shell
		provides a command line prompt after which the following commands (described in
		alphabetical order) can be entered.
	&lt;/p&gt;&lt;div class=&quot;variablelist&quot;&gt;&lt;dl class=&quot;variablelist&quot;&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;
		&lt;code class=&quot;option&quot;&gt;add
		 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;TYPE&lt;/code&gt;&lt;/em&gt;
		 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;ORIG&lt;/code&gt;&lt;/em&gt;
		 &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;REPLACE&lt;/code&gt;&lt;/em&gt;
		&lt;/code&gt;
	&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Add an entry to the catalog file. &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;TYPE&lt;/code&gt;&lt;/em&gt;
			indicates the type of entry. Possible types are: &lt;span class=&quot;simplelist&quot;&gt;&lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;public&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;system&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;uri&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;rewriteSystem&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;rewriteURI&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;delegatePublic&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;delegateSystem&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;delegateURI&lt;/code&gt;&lt;/em&gt;, &lt;em class=&quot;parameter&quot;&gt;&lt;code&gt;nextCatalog&lt;/code&gt;&lt;/em&gt;&lt;/span&gt;. &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;ORIG&lt;/code&gt;&lt;/em&gt; is the original
			reference to be replaced, and &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;REPLACE&lt;/code&gt;&lt;/em&gt;
			is the &lt;acronym class=&quot;acronym&quot;&gt;URI&lt;/acronym&gt; of the replacement entity to be
			used. The &lt;code class=&quot;option&quot;&gt;--add&lt;/code&gt; option will not overwrite
			&lt;code class=&quot;filename&quot;&gt;CATALOGFILE&lt;/code&gt;, outputting
			to &lt;code class=&quot;filename&quot;&gt;stdout&lt;/code&gt;, unless
			&lt;code class=&quot;option&quot;&gt;--noout&lt;/code&gt; is used. The &lt;code class=&quot;option&quot;&gt;--add&lt;/code&gt; will
			always take three parameters even if some of the &lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt;
			catalog constructs will have only a single argument.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;debug&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Print debugging statements showing the steps &lt;span class=&quot;command&quot;&gt;&lt;strong&gt;xmlcatalog&lt;/strong&gt;&lt;/span&gt; is executing.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;del &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;VALUE(S)&lt;/code&gt;&lt;/em&gt;&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Remove the catalog entry corresponding to &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;VALUE(S)&lt;/code&gt;&lt;/em&gt;.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;dump&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Print the current catalog.&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;exit&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Quit the shell.&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;public &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;PUBLIC-ID&lt;/code&gt;&lt;/em&gt;&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Execute a Formal Public Identifier lookup of the catalog entry
			for &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;PUBLIC-ID&lt;/code&gt;&lt;/em&gt;. The corresponding entry will be
			output to the command line.
		&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;quiet&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Stop printing debugging statements.&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;option&quot;&gt;system &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;SYSTEM-ID&lt;/code&gt;&lt;/em&gt;&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;
			Execute a Formal Public Identifier lookup of the catalog entry
			for &lt;em class=&quot;replaceable&quot;&gt;&lt;code&gt;SYSTEM-ID&lt;/code&gt;&lt;/em&gt;. The corresponding entry will be
			output to the command line.
		&lt;/p&gt;&lt;/dd&gt;&lt;/dl&gt;&lt;/div&gt;&lt;/div&gt;&lt;div class=&quot;refsect1&quot;&gt;&lt;a name=&quot;environment&quot;&gt;&lt;/a&gt;&lt;h2&gt;ENVIRONMENT&lt;/h2&gt;&lt;div class=&quot;variablelist&quot;&gt;&lt;dl class=&quot;variablelist&quot;&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;code class=&quot;envar&quot;&gt;XML_CATALOG_FILES&lt;/code&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;&lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt; catalog behavior can be changed by redirecting
			queries to the user's own set of catalogs. This can be done by setting
			the &lt;code class=&quot;envar&quot;&gt;XML_CATALOG_FILES&lt;/code&gt; environment variable to a space-separated
			list of catalogs. Use percent-encoding to escape spaces or other characters.
			An empty variable should deactivate loading the default &lt;code class=&quot;filename&quot;&gt;/etc/xml/catalog&lt;/code&gt; catalog.
		&lt;/p&gt;&lt;/dd&gt;&lt;/dl&gt;&lt;/div&gt;&lt;/div&gt;&lt;div class=&quot;refsect1&quot;&gt;&lt;a name=&quot;diagnostics&quot;&gt;&lt;/a&gt;&lt;h2&gt;DIAGNOSTICS&lt;/h2&gt;&lt;p&gt;
		&lt;span class=&quot;command&quot;&gt;&lt;strong&gt;xmlcatalog&lt;/strong&gt;&lt;/span&gt; return codes provide information that can be used when
		calling it from scripts.
	&lt;/p&gt;&lt;div class=&quot;variablelist&quot;&gt;&lt;dl class=&quot;variablelist&quot;&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;span class=&quot;errorcode&quot;&gt;0&lt;/span&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;No error&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;span class=&quot;errorcode&quot;&gt;1&lt;/span&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Failed to remove an entry from the catalog&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;span class=&quot;errorcode&quot;&gt;2&lt;/span&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Failed to save to the catalog, check file permissions&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;span class=&quot;errorcode&quot;&gt;3&lt;/span&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Failed to add an entry to the catalog&lt;/p&gt;&lt;/dd&gt;&lt;dt&gt;&lt;span class=&quot;term&quot;&gt;&lt;span class=&quot;errorcode&quot;&gt;4&lt;/span&gt;&lt;/span&gt;&lt;/dt&gt;&lt;dd&gt;&lt;p&gt;Failed to look up an entry in the catalog&lt;/p&gt;&lt;/dd&gt;&lt;/dl&gt;&lt;/div&gt;&lt;/div&gt;&lt;div class=&quot;refsect1&quot;&gt;&lt;a name=&quot;seealso&quot;&gt;&lt;/a&gt;&lt;h2&gt;SEE ALSO&lt;/h2&gt;&lt;p&gt;&lt;span class=&quot;citerefentry&quot;&gt;&lt;span class=&quot;refentrytitle&quot;&gt;libxml&lt;/span&gt;(3)&lt;/span&gt;
	&lt;/p&gt;&lt;p&gt;
		More information can be found at
		&lt;/p&gt;&lt;div class=&quot;itemizedlist&quot;&gt;&lt;ul class=&quot;itemizedlist&quot; style=&quot;list-style-type: disc; &quot;&gt;&lt;li class=&quot;listitem&quot;&gt;&lt;p&gt;&lt;span class=&quot;citerefentry&quot;&gt;&lt;span class=&quot;refentrytitle&quot;&gt;libxml&lt;/span&gt;(3)&lt;/span&gt; web page &lt;a class=&quot;ulink&quot; href=&quot;https://gitlab.gnome.org/GNOME/libxml2&quot; target=&quot;_top&quot;&gt;https://gitlab.gnome.org/GNOME/libxml2&lt;/a&gt;
				&lt;/p&gt;&lt;/li&gt;&lt;li class=&quot;listitem&quot;&gt;&lt;p&gt;&lt;span class=&quot;citerefentry&quot;&gt;&lt;span class=&quot;refentrytitle&quot;&gt;libxml&lt;/span&gt;(3)&lt;/span&gt; catalog support web page
					at &lt;a class=&quot;ulink&quot; href=&quot;https://gitlab.gnome.org/GNOME/libxml2/-/wikis/Catalog-support&quot; target=&quot;_top&quot;&gt;https://gitlab.gnome.org/GNOME/libxml2/-/wikis/Catalog-support&lt;/a&gt;
				&lt;/p&gt;&lt;/li&gt;&lt;li class=&quot;listitem&quot;&gt;&lt;p&gt;James Clark's &lt;acronym class=&quot;acronym&quot;&gt;SGML&lt;/acronym&gt; catalog
					page &lt;a class=&quot;ulink&quot; href=&quot;http://www.jclark.com/sp/catalog.htm&quot; target=&quot;_top&quot;&gt;http://www.jclark.com/sp/catalog.htm&lt;/a&gt;
				&lt;/p&gt;&lt;/li&gt;&lt;li class=&quot;listitem&quot;&gt;&lt;p&gt;&lt;acronym class=&quot;acronym&quot;&gt;OASIS&lt;/acronym&gt; &lt;acronym class=&quot;acronym&quot;&gt;XML&lt;/acronym&gt; catalog specification
					&lt;a class=&quot;ulink&quot; href=&quot;http://www.oasis-open.org/committees/entity/spec.html&quot; target=&quot;_top&quot;&gt;http://www.oasis-open.org/committees/entity/spec.html&lt;/a&gt;
				&lt;/p&gt;&lt;/li&gt;&lt;/ul&gt;&lt;/div&gt;&lt;p&gt;
	&lt;/p&gt;&lt;/div&gt;&lt;/div&gt;&lt;/body&gt;&lt;/html&gt;
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