default namespace = ""
namespace msdata = "urn:schemas-microsoft-com:xml-msdata"
namespace xsd = "http://www.w3.org/2001/XMLSchema"

start =
  element root {
    element xsd:schema {
      attribute id { xsd:NCName },
      element xsd:import {
        attribute namespace { xsd:anyURI }
      }?,
      xsd.element
    },
    element resheader {
      attribute name { xsd:NCName },
      value
    }+,
    (element assembly {
       attribute alias { xsd:NCName },
       attribute name { text }
     }
     | element data {
         attribute mimetype { text }?,
         attribute name { text },
         attribute type { text }?,
         attribute xml:space { xsd:NCName }?,
         value
       }
     | element metadata {
         attribute name { xsd:NCName },
         attribute type { text },
         value
       })*
  }
xsd.element =
  element xsd:element {
    attribute minOccurs { xsd:integer }?,
    attribute name { xsd:NCName },
    attribute type { xsd:NMTOKEN }?,
    attribute msdata:IsDataSet { xsd:boolean }?,
    attribute msdata:Ordinal { xsd:integer }?,
    element xsd:complexType {
      element xsd:choice {
        attribute maxOccurs { xsd:NCName },
        xsd.element+
      }?,
      element xsd:sequence { xsd.element+ }?,
      element xsd:attribute {
        attribute name { xsd:NCName }?,
        attribute ref { xsd:NMTOKEN }?,
        attribute type { xsd:NMTOKEN }?,
        attribute use { xsd:NCName }?,
        attribute msdata:Ordinal { xsd:integer }?
      }*
    }*
  }
value = element value { text }