# PS 3.19-2011
# A.1.6          Schema
# The Normative version of the XML Schema for the Native DICOM Model follows:
default namespace="http://dicom.nema.org/PS3.19/models/NativeDICOM"

# This schema was created as an intermediary, a means of describing
# native binary encoded DICOM objects as XML Infosets, thus allowing
# one to manipulate binary DICOM objects using familiar XML tools.
# As such, the schema is designed to facilitate a simple, mechanical,
# bi-directional translation between binary encoded DICOM and XML-like
# constructs without constraints, and to simplify identifying portions
# of a DICOM object using XPath statements.
#
# Since this schema has minimal type checking, it is neither intended
# to be used for any operation that involves hand coding, nor to
# describe a definitive, fully validating encoding of DICOM concepts
# into XML, as what one might use, for example, in a robust XML
# database system or in XML-based forms, though it may be used
# as a means for translating binary DICOM Objects into such a form
# (e.g. through an XSLT script).

start = element NativeDicomModel { DicomDataSet }

# A DICOM Data Set is as defined in PS3.5. It does not appear
# as an XML Element, since it does not appear in the binary encoded
# DICOM objects. It exists here merely as a documentation aid.
DicomDataSet = DicomAttribute*

DicomAttribute = element DicomAttribute {
  Tag, VR, Keyword?, PrivateCreator?,
  ( BulkData | Value+ | Item+ | PersonName+ )?
}
BulkData = element BulkData{ UUID }
Value = element Value { Number, xsd:string }
Item = element Item { Number, DicomDataSet }
PersonName = element PersonName {
  Number,
  element SingleByte  { NameComponents }?,
  element Ideographic { NameComponents }?,
  element Phonetic    { NameComponents }?
}

NameComponents =
  element FamilyName {xsd:string}?,
  element GivenName  {xsd:string}?,
  element MiddleName {xsd:string}?,
  element NamePrefix {xsd:string}?,
  element NameSuffix {xsd:string}?

# keyword is the attribute tag from PS3.6
# (derived from the DICOM Attribute's name)
Keyword = attribute keyword { xsd:token }
# canonical XML definition of Hex, with lowercase letters disallowed
Tag = attribute tag { xsd:string{ minLength="8" maxLength="8" pattern="[0-9A-F]{8}" } }
VR = attribute vr { "AE" | "AS" | "AT" | "CS" | "DA" | "DS" | "DT" | "FL" | "FD"
                  | "IS" | "LO" | "LT" | "OB" | "OF" | "OW" | "PN" | "SH" | "SL"
                  | "SQ" | "SS" | "ST" | "TM" | "UI" | "UL" | "UN" | "US" | "UT" }
PrivateCreator = attribute privateCreator{ xsd:string }
UUID = attribute uuid { xsd:string }
Number = attribute number { xsd:positiveInteger }