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<?xml version="1.0" encoding="UTF-8"?>
<!--

 This file is part of GtkSourceView

 Copyright (C) 2005-2007 Marco Barisione <barisione@gmail.com>
 Copyright (C) 2005-2007 Emanuele Aina

 gtksourceview is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 gtksourceview is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

-->
<!--
  This file describes the XML format used for syntax highlight
  descriptions for the GtkSourceView 1.x library.
  
  .lang files are XML files which describe how to highlight syntax;
  this RNG is used for validation purposes.
  
  .lang files should be located in $PREFIX/gtksourceview-1.0/language-specs/, 
  or in ~./gnome2/gtksourceview-1.0/language-specs/
  
  To check if a .lang file is valid, run
  
  $ xmllint FILENAME - -relaxng language.rng
  
  If you create a new .lang file or modify an existing one, please note
  that it will be (re)loaded by the application only after it is
  restarted.
-->
<!--
  Boolean type
  
  Attributes that are of type boolean allow the following values:
  
  - 'true', 'TRUE' and '1' 	all meaning true
  - 'false', FALSE' and '0' 	all meaning false
  
  It is encouraged to use 'TRUE' and 'FALSE' instead of the alternatives.
-->
<grammar xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0" 
         xmlns="http://relaxng.org/ns/structure/1.0"
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <define name="boolean">
    <choice>
      <value>true</value>
      <value>false</value>
      <value>TRUE</value>
      <value>FALSE</value>
      <value>0</value>
      <value>1</value>
    </choice>
  </define>
  <!--
    Attributes required by all element representing a syntax or pattern tag.
    
    - name		the name of the tag (it can appear in the UI)
    
    - style		the style used to highlight the tag. Recognized values
    		are (from gtksourcestylescheme.h):
    
    		- Base-N Integer	used for values with a base
    					other than 10
    		- Character		used for single characters
    		- Comment		used for comments
    		- Data Type		used for data types
    		- Function		used for function names
    		- Decimal		used for decimal values
    		- Floating Point	used for floating point values
    		- Keyword		used for keywords
    		- Preprocessor		used for preprocessor instructions
    		- String		used for strings
    		- Specials		used for 'special' things
    		- Others (DEPRECATED, replaced by "Data Type")
    		- Others 2		used for 'other' things
    		- Others 3		used for 'other' things
    
    The "name" attribute can be prefixed with "_" to be marked for
    translation.
  -->
  <define name="tagattrs">
    <choice>
      <attribute name="_name">
        <data type="string"/>
      </attribute>
      <attribute name="name">
        <data type="string"/>
      </attribute>
    </choice>
    <attribute name="style">
      <data type="string"/>
    </attribute>
  </define>
  <!--
    The root of the definition file is the element "language".
    
    Required attributes:
    
    - name		the name of the language (it can appear in menus and
    		dialog boxes)
    
    - section	the category the language belongs to (e.g. "Sources",
    		"Scripts", etc.)
    
    - version	version of the .lang file format (1.0)
    
    - mimetypes	a list of mime-types that identifies the types of file
    		that must be highlighted using the .lang file
    
    Optional attributes:
    
    - translation-domain
    		the translation domain used by the file
    
    The "name" and "section" attributes can be prefixed with
    "_" to be marked for translation.
  -->
  <define name="language">
    <element name="language">
      <ref name="attlist.language"/>
      <optional>
        <ref name="escape-char"/>
      </optional>
      <oneOrMore>
        <choice>
          <ref name="line-comment"/>
          <ref name="block-comment"/>
          <ref name="string"/>
          <ref name="syntax-item"/>
          <ref name="pattern-item"/>
          <ref name="keyword-list"/>
        </choice>
      </oneOrMore>
    </element>
  </define>
  
  <define name="attlist.language" combine="interleave">
    <choice>
      <attribute name="_name">
        <data type="string"/>
      </attribute>
      <attribute name="name">
        <data type="string"/>
      </attribute>
    </choice>
    <choice>
      <attribute name="_section">
        <data type="string"/>
      </attribute>
      <attribute name="section">
        <data type="string"/>
      </attribute>
    </choice>
    <attribute name="version">
      <data type="string">
        <param name="pattern">1\.0</param>
      </data>
    </attribute>
    <attribute name="mimetypes"/>
    <optional>
      <attribute name="translation-domain"/>
    </optional>
  </define>
  <!-- Which character is used in escape sequences. -->
  <define name="escape-char">
    <element name="escape-char">
      <ref name="attlist.escape-char"/>
      <text/>
    </element>
  </define>
  <define name="attlist.escape-char" combine="interleave">
    <empty/>
  </define>
  <!--
    The line-comment" element represents single line comments.
    The "start-regex" subelement defines the regex matching the start of
    the comment.
  -->
  <define name="line-comment">
    <element name="line-comment">
      <ref name="attlist.line-comment"/>
      <ref name="start-regex"/>
    </element>
  </define>
  <define name="attlist.line-comment" combine="interleave">
    <ref name="tagattrs"/>
  </define>
  <!--
    The "block-comment" element represents multiple lines comments.
    The "start-regex" subelement defines the regex matching the beginning of
    the comment.
    The "end-regex" subelement defines the regex matching the end of
    the comment.
  -->
  <define name="block-comment">
    <element name="block-comment">
      <ref name="attlist.block-comment"/>
      <ref name="start-regex"/>
      <ref name="end-regex"/>
    </element>
  </define>
  <define name="attlist.block-comment" combine="interleave">
    <ref name="tagattrs"/>
  </define>
  <!--
    The "string" element represents string.
    The "start-regex" subelement defines the regex matching the beginning of
    the string.
    The "end-regex" subelement defines the regex matching the end of
    the string.
    
    Optional attributes:
    
    - end-at-line-end	whether the string end at the end of line
  -->
  <define name="string">
    <element name="string">
      <ref name="attlist.string"/>
      <ref name="start-regex"/>
      <ref name="end-regex"/>
    </element>
  </define>
  <define name="attlist.string" combine="interleave">
    <ref name="tagattrs"/>
    <optional>
      <attribute name="end-at-line-end" a:defaultValue="TRUE">
        <ref name="boolean"/>
      </attribute>
    </optional>
  </define>
  <!--
    The "syntax-item" element represents a generic region of the document.
    The "start-regex" subelement defines the regex matching the beginning of
    the region.
    The "end-regex" subelement defines the regex matching the end of
    the region.
  -->
  <define name="syntax-item">
    <element name="syntax-item">
      <ref name="attlist.syntax-item"/>
      <ref name="start-regex"/>
      <ref name="end-regex"/>
    </element>
  </define>
  <define name="attlist.syntax-item" combine="interleave">
    <ref name="tagattrs"/>
  </define>
  <!--
    The "pattern-item" element represents a generic token.
    The "regex" subelement defines the regex matching the token.
  -->
  <define name="pattern-item">
    <element name="pattern-item">
      <ref name="attlist.pattern-item"/>
      <ref name="regex"/>
    </element>
  </define>
  <define name="attlist.pattern-item" combine="interleave">
    <ref name="tagattrs"/>
  </define>
  <!--
    The "keyword-list" element represents a list of keywords, it can have
    one or more "keyword" subelements each one representing a keyword.
    A "keyword" subelement defines the regex matching a keyword of the
    language.
    
    Optional attributes:
    
    - case-sensitive	whether the keywords are case sensitive
    
    - match-empty-string-at-beginning:
    			whether the empty string (\b) should be matched
    			at the beginning of the keywords
    
    - match-empty-string-at-end
    			whether the empty string (\b) should be matched
    			at the end of the keywords
    
    - beginning-regex	if all keywords start with a regex, you can
    			specify	it here to avoid doing it for
    			every single keyword
    
    - end-regex		if all keywords end with a regex, you can
    			specify	it here to avoid doing it for
    			every single keyword
  -->
  <define name="keyword-list">
    <element name="keyword-list">
      <ref name="attlist.keyword-list"/>
      <oneOrMore>
        <ref name="keyword"/>
      </oneOrMore>
    </element>
  </define>
  <define name="attlist.keyword-list" combine="interleave">
    <ref name="tagattrs"/>
    <optional>
      <attribute name="case-sensitive" a:defaultValue="TRUE">
        <ref name="boolean"/>
      </attribute>
    </optional>
    <optional>
      <attribute name="match-empty-string-at-beginning" a:defaultValue="FALSE">
        <ref name="boolean"/>
      </attribute>
    </optional>
    <optional>
      <attribute name="match-empty-string-at-end" a:defaultValue="FALSE">
        <ref name="boolean"/>
      </attribute>
    </optional>
    <optional>
      <attribute name="beginning-regex"/>
    </optional>
    <optional>
      <attribute name="end-regex"/>
    </optional>
  </define>
  <!-- Elements used inside other elements -->
  <define name="keyword">
    <element name="keyword">
      <ref name="attlist.keyword"/>
      <text/>
    </element>
  </define>
  <define name="attlist.keyword" combine="interleave">
    <empty/>
  </define>
  <define name="regex">
    <element name="regex">
      <ref name="attlist.regex"/>
      <text/>
    </element>
  </define>
  <define name="attlist.regex" combine="interleave">
    <empty/>
  </define>
  <define name="start-regex">
    <element name="start-regex">
      <ref name="attlist.start-regex"/>
      <text/>
    </element>
  </define>
  <define name="attlist.start-regex" combine="interleave">
    <empty/>
  </define>
  <define name="end-regex">
    <element name="end-regex">
      <ref name="attlist.end-regex"/>
      <text/>
    </element>
  </define>
  <define name="attlist.end-regex" combine="interleave">
    <empty/>
  </define>
  
  <start>
    <choice>
      <ref name="language"/>
    </choice>
  </start>
</grammar>