| ## Text Encoding Initiative
### The XML Version of the TEI Guidelines # <extFigure>

`<extFigure>` | (external figure) (in a writing system declaration) refers to a figure or illustration depicting the character form, which is stored in some declared notation external to the text.
Attributes | (In addition to global attributes)
`notation` | identifies the notation in which the figure is stored.
| Datatype: CDATA
| Values: a valid name associated with a given notation by means of a NOTATION declaration in the document type definition.
| Default: #REQUIRED
`entity` | gives the name of an external entity which contains the figure.
| Datatype: CDATA
| Values: a valid name associated with the external entity by means of an ENTITY declaration in the document type declaration .
| Default: #REQUIRED

Example

An image of the character form may be stored and transmitted in any desired graphics format. The declaration of the notation may specify a local system identifier for the processor (here it is imagined that we use a program called ‘pddraw.exe’ to process files in TIFF format), thus:

    <!-- in the DTD: -->
     <!NOTATION TIFF SYSTEM 'pddraw.exe'>
     <!ENTITY lcthorn SYSTEM 'lcthorn.TIF' NDATA TIFF>
            <!-- in the WSD itself: -->
     <extFigure notation="TIFF" entity='lcthorn'/>

More usually, a PUBLIC identifier is associated with the notation:

    <!-- in the DTD: -->
     <!NOTATION TIFF
                PUBLIC '-//XXX//NOTATION Tagged Image File Format//EN'>
     <!ENTITY lcthorn SYSTEM 'lcthorn.TIF' NDATA TIFF>
         <!-- in the WSD itself: -->
        <extFigure notation=TIFF entity='lcthorn'/>

Example

Character shapes may be conveniently conveyed in forms other than graphics images; one might, for example, define a character shape using a font-design program such as Donald Knuth's MetaFont program (which can be used to generate fonts for processing with TeX):

    <!-- in the DTD: -->
     <!NOTATION metafont
                PUBLIC '-//DEK//NOTATION MetaFont//EN'>
     <!ENTITY lcthorn SYSTEM 'lcthorn.TIF' NDATA metafont>
            <!-- in the WSD itself: -->
     <extFigure notation='metafont' entity='lcthorn'/>

Module Declared in file teiwsd2; Auxiliary tag set for Writing System Declarations
Data Description Empty.
May occur within
Declaration

    <!ELEMENT extFigure %om.RO;  EMPTY>
    <!ATTLIST extFigure
          %a.global;
          notation CDATA #REQUIRED
          entity CDATA #REQUIRED>

See further 25.4.2 Exceptions in the WSD

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