Download/View Schema (or DTD) for XML Import

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Where can I download the schema (or DTD) for the layout of the WordPress import/export file format?

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  1. As far as I know no one ever [publicly] documented it and all questions about that are met with “it’s like RSS, want documentation – do it yourself”.

  2. It seems to be an RSS Feed http://en.wikipedia.org/wiki/RSS
    extended with some of WordPress’s own extensions.
    Unfortunately, it applies only to posts and pages. I was thinking about using it to migrate data from PHP-Fusion to WordPress, but it would only be a partial solution.

    I tried some of the naemspaces below in the browser to see if they would give me a schema or DTD, but they did not.

    Here’s an example: 

    <rss version="2.0"
    xmlns:excerpt="http://wordpress.org/export/1.0/excerpt/"
-   xmlns:content="http://purl.org/rss/1.0/modules/content/"
    xmlns:wfw="http://wellformedweb.org/CommentAPI/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:wp="http://wordpress.org/export/1.0/"
>

<channel>
    <title>MrHebrew.com</title>
    <link>http://mrhebrew.com</link>
    <description>My Site Descr</description>
    <pubDate>Wed, 05 Jan 2011 05:54:07 +0000</pubDate>
    <generator>http://wordpress.org/?v=3.0.3</generator>
    <language>en</language>
    <wp:wxr_version>1.0</wp:wxr_version>
    <wp:base_site_url>http://mrhebrew.com</wp:base_site_url>
    <wp:base_blog_url>http://mrhebrew.com</wp:base_blog_url>
        <wp:category><wp:category_nicename>adam-and-eve</wp:category_nicename><wp:category_parent></wp:category_parent><wp:cat_name><![CDATA[Adam and Eve]]></wp:cat_name></wp:category>
        <wp:category><wp:category_nicename>book-of-joshua</wp:category_nicename><wp:category_parent></wp:category_parent><wp:cat_name><![CDATA[Book of Joshua]]></wp:cat_name></wp:category>
        <wp:tag><wp:tag_slug>jeremiah</wp:tag_slug><wp:tag_name><![CDATA[Jeremiah]]></wp:tag_name></wp:tag>
        <wp:tag><wp:tag_slug>joshua</wp:tag_slug><wp:tag_name><![CDATA[Joshua]]></wp:tag_name></wp:tag>
        <wp:tag><wp:tag_slug>judges</wp:tag_slug><wp:tag_name><![CDATA[Judges]]></wp:tag_name></wp:tag>
        <wp:tag><wp:tag_slug>king-saul</wp:tag_slug><wp:tag_name><![CDATA[King Saul]]></wp:tag_name></wp:tag>
        <item>
        <title>Another Possible Punctuation Changes Meaning Entirely</title>
        <link>http://mrhebrew.com/?p=136</link>
        <pubDate>Wed, 05 Jan 2011 05:52:49 +0000</pubDate>
        <dc:creator><![CDATA[Administrator]]></dc:creator>

        <category><![CDATA[Isaiah]]></category>

        <category domain="category" nicename="isaiah"><![CDATA[Isaiah]]></category>

        <category><![CDATA[Punctuation]]></category>

        <category domain="category" nicename="punctuation"><![CDATA[Punctuation]]></category>

        <category domain="tag"><![CDATA[punctuation]]></category>

        <category domain="tag" nicename="punctuation-2"><![CDATA[punctuation]]></category>

        <category domain="tag"><![CDATA[question-mark]]></category>

        <category domain="tag" nicename="question-mark"><![CDATA[question-mark]]></category>

        <guid isPermaLink="false">http://mrhebrew.com/?p=136</guid>
        <description></description>
        <content:encoded><![CDATA[
text of blog here 
]]></content:encoded>
        <excerpt:encoded><![CDATA[]]></excerpt:encoded>
        <wp:post_id>136</wp:post_id>
        <wp:post_date>2011-01-05 05:52:49</wp:post_date>
        <wp:post_date_gmt>2011-01-05 05:52:49</wp:post_date_gmt>
        <wp:comment_status>open</wp:comment_status>
        <wp:ping_status>open</wp:ping_status>
        <wp:post_name>another-possible-punctuation-changes-meaning-entirely</wp:post_name>
        <wp:status>publish</wp:status>
        <wp:post_parent>0</wp:post_parent>
        <wp:menu_order>0</wp:menu_order>
        <wp:post_type>post</wp:post_type>
        <wp:post_password></wp:post_password>
        <wp:is_sticky>0</wp:is_sticky>
                                <wp:postmeta>
        <wp:meta_key>_edit_lock</wp:meta_key>
        <wp:meta_value><![CDATA[1294206847]]></wp:meta_value>
        </wp:postmeta>
                <wp:postmeta>
        <wp:meta_key>_edit_last</wp:meta_key>
        <wp:meta_value><![CDATA[1]]></wp:meta_value>
        </wp:postmeta>
                <wp:postmeta>
        <wp:meta_key>_encloseme</wp:meta_key>
        <wp:meta_value><![CDATA[1]]></wp:meta_value>
        </wp:postmeta>
                <wp:postmeta>
        <wp:meta_key>_wp_old_slug</wp:meta_key>
        <wp:meta_value><![CDATA[]]></wp:meta_value>
        </wp:postmeta>
                <wp:postmeta>
        <wp:meta_key>_pingme</wp:meta_key>
        <wp:meta_value><![CDATA[1]]></wp:meta_value>
        </wp:postmeta>
                <wp:postmeta>
        <wp:meta_key>_wp_old_slug</wp:meta_key>
        <wp:meta_value><![CDATA[another-possible-punctuation-changs-meaning-entirely]]></wp:meta_value>
        </wp:postmeta>
                                <wp:comment>
        <wp:comment_id>267</wp:comment_id>
        <wp:comment_author><![CDATA[sex tubes]]></wp:comment_author>
        <wp:comment_author_email>tu23me66ner@gmail.com</wp:comment_author_email>
        <wp:comment_author_url>http://41tube.com</wp:comment_author_url>
        <wp:comment_author_IP>89.149.244.89</wp:comment_author_IP>
        <wp:comment_date>2011-01-08 20:26:32</wp:comment_date>
        <wp:comment_date_gmt>2011-01-08 20:26:32</wp:comment_date_gmt>
        <wp:comment_content><![CDATA[I can see the logic in your argument but I think you've painted your strokes]]></wp:comment_content>
        <wp:comment_approved>spam</wp:comment_approved>
        <wp:comment_type></wp:comment_type>
        <wp:comment_parent>0</wp:comment_parent>
        <wp:comment_user_id>0</wp:comment_user_id>
        </wp:comment>
            </item>
    </channel>
</rss>

  3. Here you can find an example with most important tags of a DTD used for example by InDesign for testing purposes. By reading the WordPress XML exported (WP v3.2.1), it is easy to choose and add the right tags in the right place.

    <?xml version="1.0" encoding="UTF-8" ?>
    <!ELEMENT rss ( channel ) >

    <!ELEMENT channel ( item+ ) >

    <!ELEMENT item ( title, link, pubDate, dc:creator, content:encoded ) >

    <!ELEMENT title ( #PCDATA ) >

    <!ELEMENT link ( #PCDATA ) >

    <!ELEMENT pubDate ( #PCDATA ) >

    <!ELEMENT dc:creator (#PCDATA ) >

    <!ELEMENT content:encoded ( #PCDATA ) >

    A reference link for DTD