<surface>

<surface> defines a written surface in terms of a rectangular coordinate space, optionally grouping one or more graphic representations of that space, and rectangular zones of interest within it.
Módulotranscr — 11 Representation of Primary Sources
Atributos att.coordinated (@ulx, @uly, @lrx, @lry)
startpoints to an element which encodes the starting position of the text corresponding to the inscribed part of the surface.
Estado Opcional
Tipo de datos 
data.pointer
Used byfacsimile
May contain
core: binaryObject desc gloss graphic
figures: formula
tagdocs: altIdent equiv
transcr: zone
Declaración
element surface
{
   att.global.attributes,
   att.coordinated.attributes,
   attribute start { data.pointer }?,
   ( model.glossLike*, model.graphicLike*, zone* )
}
Nota
The <surface> element represents a rectangular area of any physical surface forming part of the source material. This may be a sheet of paper, one face of a monument, a billboard, a papyrus scroll, or indeed any 2-dimensional surface.
The coordinate space defined by this element may be thought of as a grid lrx - ulx units wide and lry - ury units high. This grid is superimposed on the whole of any image directly contained by the <surface> element. The coordinate values used by every <zone> element contained by this surface are to be understood with reference to the same grid.