XMLLINT(1)                                                          XMLLINT(1)



NAME
       xmllint - command line XML tool

SYNOPSIS
       xmllint [--version --debug --shell --debugent --copy --recover --noent
               --noout --nonet --path "PATH(S)" --load-trace --htmlout
               --nowrap --valid --postvalid --dtdvalid URL --dtdvalidfpi FPI
               --timing --output FILE --repeat --insert --compress --html
               --xmlout --push --memory --maxmem NBBYTES --nowarning
               --noblanks --nocdata --format --encode ENCODING --dropdtd
               --nsclean --testIO --catalogs --nocatalogs --auto --xinclude
               --noxincludenode --loaddtd --dtdattr --stream --walker
               --pattern PATTERNVALUE --chkregister --relaxng SCHEMA
               --schema SCHEMA --c14n] {XML-FILE(S)... -}

       xmllint --help

DESCRIPTION
       The xmllint program parses one or more XML files, specified on the
       command line as XML-FILE (or the standard input if the filename
       provided is - ). 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.

       xmllint is included in libxml(3).

OPTIONS
       xmllint accepts the following options (in alphabetical order):

       --auto Generate a small document for testing purposes.

       --catalogs
              Use the SGML catalog(s) from SGML_CATALOG_FILES. Otherwise XML
              catalogs starting from /etc/xml/catalog are used by default.

       --chkregister
              Turn on node registration. Useful for developers testing
              libxml(3) node tracking code.

       --compress
              Turn on gzip(1) compression of output.

       --copy Test the internal copy implementation.

       --c14n Use the W3C XML Canonicalisation (C14N) to serialize the result
              of parsing to stdout. It keeps comments in the result.

       --dtdvalid URL
              Use the DTD specified by an URL for validation.

       --dtdvalidfpi FPI
              Use the DTD specified by a Formal Public Identifier FPI for
              validation, note that this will require a catalog exporting that
              Formal Public Identifier to work.

       --debug
              Parse a file and output an annotated tree of the in-memory
              version of the document.

       --debugent
              Debug the entities defined in the document.

       --dropdtd
              Remove DTD from output.

       --dtdattr
              Fetch external DTD and populate the tree with inherited
              attributes.

       --encode ENCODING
              Output in the given encoding.

       --format
              Reformat and reindent the output. The XMLLINT_INDENT environment
              variable controls the indentation. The default value is two
              spaces " ").

       --help Print out a short usage summary for xmllint.

       --html Use the HTML parser.

       --htmlout
              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/viewed in a browser.

       --insert
              Test for valid insertions.

       --loaddtd
              Fetch an external DTD.

       --load-trace
              Display all the documents loaded during the processing to
              stderr.

       --maxmem NNBYTES
              Test the parser memory support.  NNBYTES 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.

       --memory
              Parse from memory.

       --noblanks
              Drop ignorable blank spaces.

       --nocatalogs
              Do not use any catalogs.

       --nocdata
              Substitute CDATA section by equivalent text nodes.

       --noent
              Substitute entity values for entity references. By default,
              xmllint leaves entity references in place.

       --nonet
              Do not use the Internet to fetch DTDs or entities.

       --noout
              Suppress output. By default, xmllint outputs the result tree.

       --nowarning
              Do not emit warnings from the parser and/or validator.

       --nowrap
              Do not output HTML doc wrapper.

       --noxincludenode
              Do XInclude processing but do not generate XInclude start and
              end nodes.

       --nsclean
              Remove redundant namespace declarations.

       --output FILE
              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.

       --path "PATH(S)"
              Use the (space- or colon-separated) list of filesystem paths
              specified by PATHS to load DTDs or entities. Enclose
              space-separated lists by quotation marks.

       --pattern PATTERNVALUE
              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.

       --postvalid
              Validate after parsing has completed.

       --push Use the push mode of the parser.

       --recover
              Output any parsable portions of an invalid document.

       --relaxng SCHEMA
              Use RelaxNG file named SCHEMA for validation.

       --repeat
              Repeat 100 times, for timing or profiling.

       --schema SCHEMA
              Use a W3C XML Schema file named SCHEMA for validation.

       --shell
              Run a navigating shell. Details on available commands in shell
              mode are below (see the section called "SHELL COMMANDS").

       --stream
              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.

       --testIO
              Test user input/output support.

       --timing
              Output information about the time it takes xmllint to perform
              the various steps.

       --valid
              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 --dtdvalid
              option. By default, xmllint also checks to determine if the
              document is well-formed.

       --version
              Display the version of libxml(3) used.

       --walker
              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 an existing in-memory tree. Used for
              debugging.

       --xinclude
              Do XInclude processing.

       --xmlout
              Used in conjunction with --html. 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.

SHELL COMMANDS
       xmllint offers an interactive shell mode invoked with the --shell
       command. Available commands in shell mode include (in alphabetical
       order):

       base   Display XML base of the node.

       bye    Leave the shell.

       cat NODE
              Display the given node or the current one.

       cd PATH
              Change the current node to the given path (if unique) or root if
              no argument is given.

       dir PATH
              Dumps information about the node (namespace, attributes,
              content).

       du PATH
              Show the structure of the subtree under the given path or the
              current node.

       exit   Leave the shell.

       help   Show this help.

       free   Display memory usage.

       load FILENAME
              Load a new document with the given filename.

       ls PATH
              List contents of the given path or the current directory.

       pwd    Display the path to the current node.

       quit   Leave the shell.

       save FILENAME
              Save the current document to the given filename or to the
              original name.

       validate
              Check the document for errors.

       write FILENAME
              Write the current node to the given filename.

ENVIRONMENT
       SGML_CATALOG_FILES
              SGML catalog behavior can be changed by redirecting queries to
              the user's own set of catalogs. This can be done by setting the
              SGML_CATALOG_FILES environment variable to a list of catalogs.
              An empty one should deactivate loading the default
              /etc/sgml/catalog catalog.

       XML_CATALOG_FILES
              XML catalog behavior can be changed by redirecting queries to
              the user's own set of catalogs. This can be done by setting the
              XML_CATALOG_FILES environment variable to a list of catalogs. An
              empty one should deactivate loading the default /etc/xml/catalog
              catalog.

       XML_DEBUG_CATALOG
              Setting the environment variable XML_DEBUG_CATALOG to non-zero
              using the export command outputs debugging information related
              to catalog operations.

       XMLLINT_INDENT
              Setting the environment variable XMLLINT_INDENT controls the
              indentation. The default value is two spaces " ".

DIAGNOSTICS
       xmllint return codes provide information that can be used when calling
       it from scripts.

       0      No error

       1      Unclassified

       2      Error in DTD

       3      Validation error

       4      Validation error

       5      Error in schema compilation

       6      Error writing output

       7      Error in pattern (generated when --pattern option is used)

       8      Error in Reader registration (generated when --chkregister
              option is used)

       9      Out of memory error

SEE ALSO
       libxml(3)

       More information can be found at

       o  libxml(3) web page http://www.xmlsoft.org/

       o  W3C XSLT page http://www.w3.org/TR/xslt

AUTHOR
       John Fleck <jfleck@inkstain.net>, Ziying Sherwin <sherwin@nlm.nih.gov>,
       Heiko Rupp <hwr@pilhuhn.de>.



libxml2                             $Date$                          XMLLINT(1)
