Help:Export

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Wiki pages can be exported in a special XML format to import into another MediaWiki installation or use it elsewise for instance for analysing the content. See also m:Syndication feeds for exporting other information but pages and Help:Import on importing pages.


How to export[edit]

There are at least four ways to export pages:

By default only the current version of a page is included. Optionally you can get all versions with date, time, user name and edit summary.

Additionally you can copy the SQL database. This is how dumps of the database were made available before MediaWiki 1.5 and it won't be explained here further.

Using 'Special:Export'[edit]

To export all pages of a namespace, for example.

1. Get the names of pages to export[edit]

  • Go to Special:Allpages and choose the desired namespace.
  • Copy the list of page names to a text editor
  • Put all page names on separate lines
  • Prefix the namespace to the page names (e.g. 'Help:Contents'), unless the selected namespace is the main namespace.

2. Perform the export[edit]

  • Go to Special:Export and paste all your page names into the textbox, making sure there are no empty lines.
  • Click 'Submit query'
  • Save the resulting XML to a file using your browser's save facility.

and finally...

  • Open the XML file in a text editor. Scroll to the bottom to check for error messages.

Now you can use this XML file to perform an import.

Exporting the full history[edit]

A checkbox in the Special:Export interface selects whether to export the full history (all versions of an article) or the most recent version of articles. A maximum of 1000 revisions are returned; other revisions can be requested as detailed in MW:Parameters to Special:Export.

Export format[edit]

The format of the XML file you receive is the same in all ways. This format is codified in XML Schema at http://www.mediawiki.org/xml/export-0.6.xsd. This format is not intended for viewing in a web browser, though some browsers show you pretty-printed XML with "+" and "-" links to view or hide selected parts. Alternatively the XML-source can be viewed using the "view source" feature of the browser, or after saving the XML file locally, with a program of choice. If you directly read the XML source it won't be difficult to find the actual wikitext. If you don't use a special XML editor "<" and ">" appear as &lt; and &gt;, to avoid a conflict with XML tags; to avoid ambiguity, "&" is coded as "&amp;".

In the current version the export format does not contain an XML replacement of wiki markup (see Wikipedia DTD for an older proposal, or Wiki Markup Language). You only get the wikitext as you get when editing the article. (After export you can use alternative parsers to convert wikitext to other format)

Example[edit]

  <mediawiki xml:lang="en">
    <page>
      <title>Page title</title>
      <restrictions>edit=sysop:move=sysop</restrictions>
      <revision>
        <timestamp>2001-01-15T13:15:00Z</timestamp>
        <contributor><username>Foobar</username></contributor>
        <comment>I have just one thing to say!</comment>
        <text>A bunch of [[text]] here.</text>
        <minor />
      </revision>
      <revision>
        <timestamp>2001-01-15T13:10:27Z</timestamp>
        <contributor><ip>10.0.0.2</ip></contributor>
        <comment>new!</comment>
        <text>An earlier [[revision]].</text>
      </revision>
    </page>
 
    <page>
      <title>Talk:Page title</title>
      <revision>
        <timestamp>2001-01-15T14:03:00Z</timestamp>
        <contributor><ip>10.0.0.2</ip></contributor>
        <comment>hey</comment>
        <text>WHYD YOU LOCK PAGE??!!! i was editing that jerk</text>
      </revision>
    </page>
  </mediawiki>

DTD[edit]

Here is an unofficial, short Document Type Definition version of the format. If you don't know what a DTD is just ignore it.

<!ELEMENT mediawiki (siteinfo?,page*)>
<!-- version contains the version number of the format (currently 0.3) -->
<!ATTLIST mediawiki
  version  CDATA  #REQUIRED 
  xmlns CDATA #FIXED "http://www.mediawiki.org/xml/export-0.3/"
  xmlns:xsi CDATA #FIXED "http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation CDATA #FIXED
    "http://www.mediawiki.org/xml/export-0.3/ http://www.mediawiki.org/xml/export-0.3.xsd"
>
<!ELEMENT siteinfo (sitename,base,generator,case,namespaces)>
<!ELEMENT sitename (#PCDATA)>      <!-- name of the wiki -->
<!ELEMENT base (#PCDATA)>          <!-- url of the main page -->
<!ELEMENT generator (#PCDATA)>     <!-- MediaWiki version string -->
<!ELEMENT case (#PCDATA)>          <!-- how cases in page names are handled -->
   <!-- possible values: 'first-letter' | 'case-sensitive'
                         'case-insensitive' option is reserved for future -->
<!ELEMENT namespaces (namespace+)> <!-- list of namespaces and prefixes -->
  <!ELEMENT namespace (#PCDATA)>     <!-- contains namespace prefix -->
  <!ATTLIST namespace key CDATA #REQUIRED> <!-- internal namespace number -->
<!ELEMENT page (title,id?,restrictions?,(revision|upload)*)>
  <!ELEMENT title (#PCDATA)>         <!-- Title with namespace prefix -->
  <!ELEMENT id (#PCDATA)> 
  <!ELEMENT restrictions (#PCDATA)>  <!-- optional page restrictions -->
<!ELEMENT revision (id?,timestamp,contributor,minor?,comment,text)>
  <!ELEMENT timestamp (#PCDATA)>     <!-- according to ISO8601 -->
  <!ELEMENT minor EMPTY>             <!-- minor flag -->
  <!ELEMENT comment (#PCDATA)> 
  <!ELEMENT text (#PCDATA)>          <!-- Wikisyntax -->
  <!ATTLIST text xml:space CDATA  #FIXED "preserve">
<!ELEMENT contributor ((username,id) | ip)>
  <!ELEMENT username (#PCDATA)>
  <!ELEMENT ip (#PCDATA)>
<!ELEMENT upload (timestamp,contributor,comment?,filename,src,size)>
  <!ELEMENT filename (#PCDATA)>
  <!ELEMENT src (#PCDATA)>
  <!ELEMENT size (#PCDATA)>

Processing XML export[edit]

There are undoubtedly many tools which can process the exported XML. If you process a large number of pages (for instance a whole dump) you probably won't be able to get the document in main memory so you will need a parser based on SAX or other event-driven methods.

You can also just use regular expressions to directly process parts of the XML code. This may be faster than other methods but not recommended because it's difficult to maintain.

Please list methods and tools for processing XML export here:

Details and practical advice[edit]

  • To determine the namespace of a page you have to match its title to the prefixed defined in

/mediawiki/siteinfo/namespaces/namespace

  • Possible restrictions are
    • sysop (protected pages)

See also[edit]

Wikipedia-specific help[edit]