# /=====================================================================\ 
# |  LaTeXML-classes.rnc                                                |
# | Document Type for LaTeXML generated documents                       |
# |=====================================================================|
# | Part of LaTeXML:                                                    |
# |  Public domain software, produced as part of work done by the       |
# |  United States Government & not subject to copyright in the US.     |
# |=====================================================================|
# | Bruce Miller <bruce.miller@nist.gov>                        #_#     |
# | http://dlmf.nist.gov/LaTeXML/                              (o o)    |
# \=========================================================ooo==U==ooo=/

default namespace = "http://dlmf.nist.gov/LaTeXML"

# Basic element classes:

## All strictly inline elements.
Inline.class = notAllowed

## All `physical' block elements. 
## A physical block is typically displayed as a block, but
## may not constitute a complete logical unit.
Block.class = notAllowed

## Additional miscellaneous elements that can appear in
## both inline and block contexts.
Misc.class = notAllowed

## All logical block level elements.
## A logical block typically contains one or more physical block elements.
## For example, a common situation might be \elementref{p},\elementref{equation},\elementref{p},
## where the entire sequence comprises a single sentence.
Para.class = notAllowed

## All metadata elements, typically representing hidden data.
Meta.class = notAllowed

# ======================================================================
# Attribute types

## The type for attributes specifying a length.
## Should be a number followed by a length, typically px.
## NOTE: To be narrowed later.
Length.type = text

## The type for attributes specifying a color.
## NOTE: To be narrowed later.
Color.type = text

# ======================================================================
## Attributes shared by ALL elements.
Common.attributes =

#  ## provides for namespace declaration.
#  attribute xmlns { text }?,

  ## a space separated list of tokens, as in CSS.
  ## The \attr{class} can be used to add differentiate different instances of elements
  ## without introducing new element declarations.
  ## However, this generally shouldn't be used for deep semantic distinctions.
  ## This attribute is carried over to HTML and can be used for CSS selection.
  ## [Note that the default XSLT stylesheets for html and xhtml
  ## add the latexml element names to the class of html elements
  ## for more convenience in using CSS.]
  attribute class { xsd:NMTOKENS }?,

  ## CSS styling rules.
  ## These will only be effective when the target system supports CSS.
  attribute cssstyle { text }?,

  RDF.attributes,

  ## Language attribute
  attribute xml:lang { text }?

## Attributes for elements that can be cross-referenced
## from inside or outside the document.
ID.attributes = 

  ## the unique identifier of the element, 
  ## usually generated automatically by the latexml.
  attribute xml:id { xsd:ID }?,
  ## a "fragment identifier" derived from the \attr{xml:id} 
  ## relative to a page split from the complete document.
  ## This is used internally and may go away some day.
  attribute fragid { text }?  

## Attributes for elements that can cross-reference other elements.
IDREF.attributes =

  ## the identifier of the referred-to element.
  attribute idref { xsd:IDREF }?

## Attributes for elements that can be labelled from within LaTeX.
## These attributes deal with assigning a label  and generating cross references.
## The label migrates to an \attr{xml:id} and \attr{href} and the element
## can serve as a hypertext target.
Labelled.attributes =
  ID.attributes,

  ## Records the various labels that LaTeX uses for crossreferencing.
  ## (note that \cs{label} can associate more than one label with an object!)
  ## It consists of space separated labels for the element.
  ## The \cs{label} macro provides the label prefixed by \texttt{LABEL:};
  ## Spaces in a label are replaced by underscore.
  ## Other mechanisms (like acro?) might use other prefixes (but \texttt{ID:} is reserved!)
  attribute labels { text }?,

  ## the reference number (ie. section number, equation number, etc) of the object.
  attribute refnum { text }?,

  ## the formatted reference number of the object as it would appear when labelling the object,
  ## typically this is the refnum with the object type prepended, such as "Chapter 2".
  ## This is what eg, \cs{labelenumi} or \cs{fnum@table} would produce.  
  ## This attribute is only needed when different from \attr{refnum}.
  attribute frefnum { text }?,

  ## the referencing reference number of the object as it might appear
  ## when referencing the object, such as an equation number with parentheses.
  ## This is useful for generated references to clarify the type of object,
  ##  but is not used with LaTeX's usual \cs{ref}.
  ## And, note that \cs{eqnref} puts its own parentheses.
  ## This attribute is only needed when different from both \attr{frefnum} and  \attr{refnum}.
  attribute rrefnum { text }?

## Attributes for elements that can be referred to from within LaTeX.
## Such elements may serve as the starting point of a hypertext link.
## The reference can be made using \attr{label}, \attr{xml:id} or \attr{href};
## these attributes will be converted, as needed, from the former to the latter.
Refable.attributes =
  IDREF.attributes,

  ## reference to a LaTeX labelled object;
  ## See the \attr{labels} attribute of \patternref{Labelled.attributes}.
  attribute labelref { text }?,

  ## reference to an arbitrary url.
  attribute href { text }?

## Attributes for elements that contain (indirectly) text whose font can be specified.
Fontable.attributes =

  ## Indicates the font to use. It consists of a space separated sequence
  ## of values representing the
  ## family (\texttt{serif}, \texttt{sansserif}, \texttt{math}, \texttt{typewriter},
  ##     \texttt{caligraphic}, \texttt{fraktur}, \texttt{script}, \ldots),
  ## series (\texttt{medium}, \texttt{bold}, \ldots),
  ## and shape (\texttt{upright}, \texttt{italic}, \texttt{slanted}, \texttt{smallcaps}, \ldots).
  ## Only the values differing from the current context are given.
  ## Each component is open-ended, for extensibility; it is thus unclear
  ## whether unknown values specify family, series or shape.
  ## In postprocessing, these values are carried to the \attr{class} attribute,
  ## and can thus be effected by CSS.
  attribute font { text }?,

  ## Indicates the text size to use, as a length, as in CSS.
  ## Normally, this should be a percentage value relative to the containing element.
  attribute fontsize { Length.type }?

## Attributes for elements that draw something, text or otherwise, that can be colored.
Colorable.attributes =
  ## the color to use (for foreground material); any CSS compatible color specification.
  ## In postprocessing, these values are carried to the \attr{class} attribute,
  ## and can thus be effected by CSS.
  attribute color { text }?,

  ## the opacity of foreground material; a number between 0 and 1.
  attribute opacity { xsd:float }?

## Attributes for elements that take up space and make sense to have a background color.
## This is independent of the colors of any things that it may draw.
Backgroundable.attributes =
  ## the color to use for the background of the element; any CSS compatible color specification.
  ## In postprocessing, these values are carried to the \attr{class} attribute,
  ## and can thus be effected by CSS; the background will presumably
  ## correspond to a bounding rectangle, but is determined by the CSS rendering engine.
  attribute backgroundcolor { text }?

## Attributes shared by low-level, generic inline and block elements
## that can be sized or shifted.
Positionable.attributes =

  ## the desired width of the box
  attribute width { Length.type }?,

  ## the desired height of the box
  attribute height { Length.type }?,

  ## the desired depth of the box
  attribute depth { Length.type }?,

  ## horizontal shift the position of the box.
  attribute xoffset { Length.type }?,

  ## vertical shift the position of the box.
  attribute yoffset { Length.type }?,

  ## alignment of material within the box.
  attribute align { "left" | "center" | "right" | "justified" }?,

  ## specifies which line of the box is aligned to the baseline of the containing object.
  ## The default is baseline. 
  attribute vattach { "top" | "middle" | "bottom" | "baseline" }?,

  ## the horizontal floating placement parameter that determines where the object is displayed.
  attribute float { ( "right" | "left" | text) }?,

  ## the kind of frame or outline for the box.
  attribute framed { "rectangle" | "underline" | text }?,

  ## the color of the frame or outlie for the box.
  attribute framecolor { text }?

## Attributes shared by (hopefully few) elements that can be transformed.
## Such elements should also have Positionable.attributes.
## Transformation order of an individual element is assumed to be
## translate, scale, rotate; wrap elements to achieve different orders.
## Attributes \attr{innerwidth}, \attr{innerheight} and \attr{innerdepth} describe
## the size of the contents of the element before transformation;
## The result size would be encoded in Positional.attributes.
Transformable.attributes =
  ## horizontal shift the position of the inner element.
  attribute xtranslate { Length.type }?,

  ## vertical shift the position of the inner element.
  attribute ytranslate { Length.type }?,

  ## horizontal scaling of the inner element.
  attribute xscale { text }?,

  ## vertical scalign of the inner element.
  attribute yscale { text }?,

  ## the rotation angle, counter-clockwise, in degrees.
  attribute angle { text }?,

  ## the expected width of the contents of the inner element
  attribute innerwidth { Length.type }?,

  ## the expected height of the contents of the inner element
  attribute innerheight { Length.type }?,

  ## the expected depth of the contents of the inner element
  attribute innerdepth { Length.type }?


## Attributes for elements that may be converted to image form
## during postprocessing, such as math, graphics, pictures, etc.
## Note that these attributes are generally not filled in until postprocessing,
## but that they could be init
Imageable.attributes =

  ## the file, possibly generated from other data.
  attribute imagesrc { xsd:anyURI }?,

  ## the width in pixels of \attr{imagesrc}.
  attribute imagewidth { xsd:nonNegativeInteger}?,

  ## the height in pixels of \attr{imagesrc}.
  ## Note that, unlike \TeX, this is the total height, including the depth (if any).
  attribute imageheight { xsd:nonNegativeInteger }?,

  ## the depth in pixels of \attr{imagesrc}, being the location of the
  ## baseline of the content shown in the image.
  ## When displayed inilne, an image with a positive \attr{depth}
  ## should be shifted down relative to the baseline of neighboring material.
  attribute imagedepth { xsd:integer }?,

  ## a description of the image
  attribute description { text }?

## Attributes for RDFa (Resource Description Framework),
## following RDFa Core 1.1 \url{http://www.w3.org/TR/rdfa-syntax/}.
## The following descriptions give a short overview of the usage of the attributes,
## but see the specification for the complete details, which are sometimes complex.
RDF.attributes = 
  ## indicates the default vocabulary
  ## (generally should be managed by LaTeXML and only appear on root node)
  attribute vocab { text }?,

  ## specifies a mapping between CURIE prefixes and IRI (URI).
  ## (generally should be managed by LaTeXML and only appear on root node)
  attribute prefix { text }?,


  ## indicates the subject for predicates appearing on the same or descendant nodes.
  attribute about { text }?,

  ## gives the label for the document element that serves as the subject;
  ## it will be converted to \attr{aboutidref} and \attr{about} during post-processing.
  attribute aboutlabelref { text }?,

  ## gives the id for the document element that serves as the subject;
  ## it will be converted to \attr{about} during post-processing.
  attribute aboutidref { text }?,

  ## indicates the subject for predicates appearing on descendant nodes,
  ## and also indicates the object for predicates
  ## when \attr{property} appears on the same node,
  ## or when \attr{rel} or \attr{rev} appears on an ancestor.
  attribute resource { text }?,

  ## gives the label for the document element that serves as the resource object;
  ## it will be converted to \attr{resourceidref} and \attr{resource} during post-processing.
  attribute resourcelabelref { text }?,

  ## gives the id for the document element that serves as the resource object;
  ## it will be converted to \attr{resource} during post-processing.
  attribute resourceidref { text }?,

  ## indicates the predicate and
  ## asserts that the subject is related by that predicate to the object.
  ## The subject is determined by one of \attr{about} on same node,
  ## \attr{resource} or \attr{typeof} on an ancestor node, or by the document root.
  ## The object is determined by one of \attr{resource}, \attr{href}, \attr{content}
  ## or \attr{typeof} on the same node, or by the text content of the node.
  attribute property { text }?,

  ## indicates the predicate exactly as \attr{property} except that it can
  ## assert multiple RDF triples where the objects are the nearest descendent \attr{resource}s.
  attribute rel { text }?,

  ## indicates the predicate exactly as \attr{rel} except that it indicates
  ## the reverse relationship (with subject and object swapped).
  attribute rev { text }?,

  ## indicates the type of the \attr{resource} and thus implicitly asserts a relation
  ## that the object has the given type.
  ## Additionally, if no \attr{resource} was given on the same node,
  ## indicates an anonymous subject and or object exactly as \attr{resource}
  attribute typeof { text }?,


  ## indicates the datatype of the target resource;
  attribute datatype { text }?,

  ## indicates the content of the property to be used as the object,
  ## to be used instead of the content of the element itself;
  attribute content { text }?

## Attributes for raw data storage
Data.attributes =
  ## the data itself
  attribute data { text }?,

  ## the MIME type of the data
  attribute datamimetype { text }?,

  ## the encoding of the data (either empty, base64, or )
  attribute dataencoding { text }?







