<!ENTITY % extra_tags "model_num, picture, diagram,">
<!ELEMENT model_num (#PCDATA)>
<!ELEMENT picture EMPTY>
<!ATTLIST picture
    src ENTITY #REQUIRED
>

<!NOTATION dos SYSTEM "dos_batch">
<!NOTATION perl SYSTEM "perl">

<!ELEMENT batch_script (#PCDATA)>
<!ATTLIST batch_script
    lang NOTATION (dos | perl) #IMPLIED
>

<!ELEMENT diagram ANY>

<!ELEMENT svg:svg (svg:desc, (svg:rect | svg:path)+)>
<!ATTLIST svg:svg
    width CDATA "1"
    height CDATA "1"
    xmlns:svg CDATA #FIXED "http://www.w3.org/2000/svg-20000303-stylable"
>

<!ELEMENT svg:desc (#PCDATA)>

<!ELEMENT svg:rect EMPTY>
<!ATTLIST svg:rect
    transform CDATA "1"
    x CDATA "1"
    y CDATA "1"
    width CDATA "1"
    height CDATA "1"
>


<!ELEMENT svg:path EMPTY>
<!ATTLIST svg:path
    d CDATA "1"
>

<!NOTATION gif SYSTEM "images/gif">