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File: GraphXML.dtd
<!-- Graph Specification dtd                                                 -->

<!-- Centrum voor Wiskunde en Informatica (CWI)                              -->

<!--

 Copyright Stichting Mathematisch Centrum 2000



  Permission to use and distribute this software and its

  documentation for any purpose is hereby granted without fee, provided that

  the above copyright notice, author statement and this permission,

  warranties and liability notice appear in all copies of this software

  and related documentation.



  Warranties

  Stichting Mathematisch Centrum makes no warranties, express or implied, with

  regard to this software. In particular, but without limitation, SMC makes

  no warranty of fitness for a particular use, no warranty of freedom from

  infringement of any patent or copyright, nor any warranty as to accuracy.

  Accordingly, SMC assumes no obligation to furnish assistance of any kind

  whatsoever or to furnish additional information or documentation.



  Liability

  In no event shall Stichting Mathematisch Centrum be liable for any damages

  arising out of or in connection with the use or performance of this

  software.



  Amsterdam, 21 June, 2000

  

  Version 1.1

  

-->



<!-- These entities are just to make the description simpler -->

<!ENTITY % common-elements "label|data|dataref|properties">



<!-- These entities are the basis of the user's extension mechanism -->

<!ENTITY % rootExtensions "">

<!ENTITY % nodeExtensions "">

<!ENTITY % edgeExtensions "">

<!ENTITY % graphExtensions "">

<!ENTITY % editExtensions "">



<!ENTITY % admissibleProperties "">

<!ENTITY % admissibleGraphProperties "">



<!-- ========================================================================= -->

<!-- ========================================================================= -->



<!-- A file consists of a graph definition and, optionally,                    -->

<!-- addinitional definitions and edit nodes                                   -->

<!-- The real 'content' might be preceeded by optional data                    -->

<!ELEMENT GraphXML ((%common-elements;

                     %rootExtensions;

                     |style)*,graph*,(edit|edit-bundle)*)>



<!--

  Note that, according to the official W3C specification, the definition

  of the xlink namespace on the root level should be enough for the whole

  document (children should inherit namespaces). However, some xml processors

  (like IE5.0) does not know that feature yet, so the same attribute

  specification is repeated for all children nodes which use it.

-->

<!ATTLIST GraphXML 

    xmlns:xlink    CDATA    #FIXED    "http://www.w3.org/1999/xlink/namespace/"

>

<!-- ========================================================================= -->

<!-- ========================================================================= -->





<!-- ========================================================================= -->

<!--                      The definition part                                  -->

<!-- ========================================================================= -->



<!-- A graph consists of an optional label, references to icons, URL-s to      -->

<!-- external data, locally stored data and, finally, nodes and edges          -->

<!ELEMENT graph ((%common-elements;

                  %graphExtensions;

                  |style|icon|size)*,(node|edge)*)>

<!ATTLIST graph

    vendor           CDATA        #IMPLIED

    version          CDATA        #IMPLIED

    id               ID           #IMPLIED

    class            CDATA        #IMPLIED

    preferredlayout  CDATA        #IMPLIED

>



<!-- An icon to representing a full graph                                      -->

<!ELEMENT icon EMPTY>

<!ATTLIST icon

    xmlns:xlink     CDATA                #FIXED   "http://www.w3.org/1999/xlink/namespace/"

    xlink:type      CDATA                #FIXED   "simple"

    xlink:role      CDATA                #FIXED   "Icon image for the full graph"

    xlink:title     CDATA                #IMPLIED   

    xlink:show      (new|parsed|replace) #FIXED   "parsed"

    xlink:actuate   (user|auto)          #FIXED   "auto"

    xlink:href      CDATA                #REQUIRED

>



<!-- ========================================================================= -->

<!--                   Editing of graphs                                       -->

<!-- ========================================================================= -->

<!ELEMENT edit ((%common-elements;

                 %editExtensions;)*,

                 (node|edge)*)>

<!ATTLIST edit

    xmlns:xlink     CDATA                #FIXED   "http://www.w3.org/1999/xlink/namespace/"

    action          (replace|remove)     #REQUIRED

    xlink:type      CDATA                #FIXED   "simple"

    xlink:role      CDATA                #FIXED   "Reference to graph"

    xlink:title     CDATA                #IMPLIED   

    xlink:show      (new|parsed|replace) #FIXED   "new"

    xlink:actuate   (user|auto)          #FIXED   "user"

    xlink:href      CDATA                #IMPLIED

    class           CDATA                #IMPLIED

>



<!ELEMENT edit-bundle (edit*)>

<!ATTLIST edit-bundle

    class       CDATA        #IMPLIED

>



<!-- ========================================================================= -->

<!--                   Nodes and edges                                         -->

<!-- ========================================================================= -->



<!-- A node may include element information; it has a unique identifier        -->

<!ELEMENT node (%common-elements;

                %nodeExtensions;

                |style|position|size|transform|subgraph-style)*>

<!ATTLIST node

    xmlns:xlink     CDATA                #FIXED   "http://www.w3.org/1999/xlink/namespace/"

    name            CDATA                #REQUIRED

    isMetanode      (true|false)         "false"

    xlink:type      CDATA                #FIXED   "simple"

    xlink:role      CDATA                #FIXED   "Reference to graph"

    xlink:title     CDATA                #IMPLIED

    xlink:show      (new|parsed|replace) #FIXED   "new"

    xlink:actuate   (user|auto)          #FIXED   "user"

    xlink:href      CDATA                #IMPLIED

    class           CDATA                #IMPLIED

>



<!-- An edge may include element information; it may have an identifier, and   -->

<!-- it has to give its source and target                                      -->

<!ELEMENT edge (%common-elements;

                %edgeExtensions;

                |style|path)*>

<!ATTLIST edge

    name       CDATA        #IMPLIED

    source     CDATA        #REQUIRED

    target     CDATA        #REQUIRED

    class      CDATA        #IMPLIED

    isDirected (true|false) #IMPLIED

>



<!-- ========================================================================= -->



<!-- Properties are placeholders for key-value pairs                           -->

<!ELEMENT properties EMPTY>

<!ATTLIST properties 

    class   CDATA   #IMPLIED

    %admissibleProperties;

>



<!-- Graph-specific-properties are placeholders for key-value pairs,           -->

<!-- within the context of the current (innermost nested) graph                -->

<!ELEMENT graph-specific-properties EMPTY>

<!ATTLIST graph-specific-properties 

    class   CDATA   #IMPLIED

    %admissibleGraphProperties;

>



<!ELEMENT label (#PCDATA)>

<!ATTLIST label

    class       CDATA        #IMPLIED

>



<!ELEMENT data (#PCDATA)>

<!ATTLIST data

    class       CDATA        #IMPLIED

>



<!ELEMENT dataref (ref*)>

<!ATTLIST dataref

    xmlns:xlink     CDATA                #FIXED      "http://www.w3.org/1999/xlink/namespace/"

    xlink:type      CDATA                #FIXED   "extended"

    xlink:role      CDATA                #FIXED   "Reference to external application data"

    xlink:title     CDATA                #IMPLIED

    xlink:show      (new|parsed|replace) #FIXED   "new"

    xlink:actuate   (user|auto)          #FIXED   "user"

    class           CDATA                #IMPLIED

>



<!-- links are like the html urls                                              -->

<!ELEMENT ref EMPTY>

<!ATTLIST ref     

    xmlns:xlink     CDATA                #FIXED      "http://www.w3.org/1999/xlink/namespace/"

    xlink:type      CDATA                #FIXED   "locator"

    xlink:role      CDATA                #IMPLIED

    xlink:title     CDATA                #IMPLIED

    xlink:show      (new|parsed|replace) #FIXED   "new"

    xlink:actuate   (user|auto)          #FIXED   "user"

    xlink:href      CDATA                #REQUIRED

    class           CDATA                #IMPLIED

>



<!-- position of a node                                                        -->

<!ELEMENT position  EMPTY>

<!ATTLIST position

    x         CDATA   "0.0" 

    y         CDATA   "0.0" 

    z         CDATA   "0.0"

    class     CDATA   #IMPLIED

>



<!-- size of a node or a graph                                                 -->

<!ELEMENT size EMPTY>

<!ATTLIST size

    width   CDATA     #REQUIRED

    height  CDATA     #REQUIRED

    depth   CDATA     "0.0"

    class   CDATA     #IMPLIED

>



<!-- the path of an edge is a sequence of positions                            -->

<!ELEMENT path (position)*>

<!ATTLIST path

    type    (polyline|spline|arc)   "polyline"

    class   CDATA                   #IMPLIED

>



<!ELEMENT transform EMPTY>

<!ATTLIST transform

    matrix  CDATA   "1.0 0.0 0.0 0.0  0.0 1.0 0.0 0.0  0.0 0.0 1.0 0.0"

    class   CDATA   #IMPLIED

>



<!-- ========================================================================= -->

<!--

    In all specifications, colour can be:

        name: black, blue, cyan, darkGray, gray, green, lightGray, magenta, orange, pink, red, white, yellow

        #rrggbb

        #rrggbbaa

-->





<!ELEMENT style (line|fill|implementation)*>

<!ELEMENT subgraph-style (line|fill|implementation)*>



<!ELEMENT line EMPTY>

<!-- linestyle can be: none, solid, dashed, dash-dotted, dotted, or #bbbb -->

<!ATTLIST line

    tag         (edge|node)     "edge"

    class        CDATA           #IMPLIED

    color        CDATA           #IMPLIED

    colour       CDATA           #IMPLIED

    colour_start CDATA           #IMPLIED

    colour_end   CDATA           #IMPLIED

    color_start  CDATA           #IMPLIED

    color_end    CDATA           #IMPLIED

    linestyle    CDATA           #IMPLIED

    linewidth    CDATA           #IMPLIED

>



<!ELEMENT fill EMPTY>

<!ATTLIST fill

    xmlns:xlink     CDATA                   #FIXED      "http://www.w3.org/1999/xlink/namespace/"

    tag             (edge|node)             "node"

    class           CDATA                   #IMPLIED

    color           CDATA                   #IMPLIED

    colour          CDATA                   #IMPLIED

    fillstyle       (solid|none|background) #IMPLIED

    xlink:type      CDATA                   #FIXED   "simple"

    xlink:role      CDATA                   #FIXED   "Fill image or pattern"

    xlink:title     CDATA                   #IMPLIED

    xlink:show      (new|parsed|replace)    #FIXED   "parsed"

    xlink:actuate   (user|auto)             #FIXED   "user"

    xlink:href      CDATA                   #IMPLIED

    imagefill       (resize|duplicate|none) #IMPLIED

>



<!ELEMENT implementation EMPTY>

<!ATTLIST implementation

    tag         (edge|node)     #REQUIRED

    class       CDATA           #IMPLIED

    scriptname  CDATA           #IMPLIED

>