epub-mathml3-inc.rnc

default namespace m = "http://www.w3.org/1998/Math/MathML"
namespace local = ""
namespace x = "http://www.w3.org/1999/xhtml"
namespace ev = "http://www.w3.org/2001/xml-events"
namespace ssml = "http://www.w3.org/2001/10/synthesis"
namespace epub = "http://www.idpf.org/2007/ops"

# #####################################################################
# 
#  MathML validation based on the schemas from the Nu Html Checker,
#  with the following changes:
#    - Content MathML is only allowed in annotation-xml
#    - annotation-xml follows the restrictions defined in
#      EPUB Content Documents
#    - EPUB SSML attributes are allowed
#
# #####################################################################

include "mathml/mathml3-inc.rnc" {

    # extend to circumvent datatype collisions
    NonMathMLAtt =
        attribute * - (local:* | m:* | xml:* | x:* | ev:* | ssml:* | epub:*) {
            datatype.string
        }

    # as ops allows presentation mathml only at top level, kill the contribution to MathExpression
    MathExpression = semantics | PresentationExpression
    
    # override annotation-xml with EPUB restrictions
    annotation-xml = epub.annotation-xml
}
# Common attribute extensions
# - epub:type
CommonAtt &= epub.type.attr?
# - SSML attributes 
CommonAtt &= epub.ssml.ph.attr?
# - xml:base
CommonAtt &= common.attrs.xmlbase?
# - ARIA
CommonAtt  &= aria.global?

annotation-xml.model.xhtml |= common.inner.flow
annotation-xml.model.svg |= svg


# The following comes from validator.nu’s xhtml5-svg-mathml.rnc driver:
# in our integration, <mtext> is the only MathML "token element" that can
# contain HTML element content; the <mi>, <mn>, <mo> and <ms> elements
# cannot; see http://www.w3.org/Bugs/Public/show_bug.cgi?id=9859#c8 for a
# rationale
mtext.content |= common.elem.phrasing

# EPUB very specific annotation-xml restrictions:
epub.annotation-xml =
    ( annotation-xml.xhtml
    | annotation-xml.svg
    | epub.annotation-xml.mathml.content
    | epub.annotation-xml.mathml.presentation
    )
    epub.annotation-xml.attributes = CommonAtt, cd?, src?
    epub.annotation-xml.mathml.content =
        element annotation-xml {
            epub.annotation-xml.model.mathml.content, epub.annotation-xml.attributes,
            epub.att-encoding.mathml.content, epub.att-name.mathml.content
        }
        epub.annotation-xml.model.mathml.content = 
          ContExp*
        epub.att-encoding.mathml.content =
          attribute encoding {
            string "MathML-Content" | string "application/mathml-content+xml"
          }
        epub.att-name.mathml.content =
          attribute name {
            string "contentequiv"
          }
    epub.annotation-xml.mathml.presentation =
        element annotation-xml {
            epub.annotation-xml.model.mathml.presentation, epub.annotation-xml.attributes,
            epub.att-encoding.mathml.presentation, epub.att-name.mathml.presentation?
        }
        epub.annotation-xml.model.mathml.presentation = 
          MathExpression*
        epub.att-encoding.mathml.presentation =
          attribute encoding {
            string "MathML" | "MathML-Presentation" | string "application/mathml-presentation+xml"
          }
        epub.att-name.mathml.presentation =
          attribute name {
            xsd:NCName
          }