Web-LangTag/registries/ltru.rnc

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# RelaxNG schema for the "language tag" registry specified in RFC 4646
# and available at http://www.iana.org/assignments/language-subtag-registry
# Not standard in any way, just an individual proposal
# Stephane Bortzmeyer <bortzmeyer@nic.fr>
# TODO: add Schematron rules for constraints such as "Records that
# contain a 'Preferred-Value' field MUST also have a 'Deprecated'
# field. " This specific constraint does not really require
# Schematron, but others may.
start = registry
registry = element registry {date & languages & extlangs & scripts & regions & variants &
redundants & grandfathereds} # TODO: extensions
date = element date {xsd:date}
languages = language*
language = element language {subtag & common & scope? & suppress-script? & macrolanguage?}
extlangs = extlang*
extlang = element extlang {subtag & common & scope? & macrolanguage?}
scripts = script*
script = element script {subtag & common}
regions = region*
region = element region {subtag & common}
variants = variant*
variant = element variant {subtag & common & prefix*} # "Records of type 'variant'
# MAY have more than one field of type" 'Prefix'.
grandfathereds = grandfathered*
grandfathered = element grandfathered {tag & common}
redundants = redundant*
redundant = element redundant {tag & common}
common = added & descriptions & deprecated? & preferred-value?
added = element added {xsd:date}
suppress-script = element suppress-script {text}
descriptions = description+ # Each record MUST contain the following fields
description = element description {text}
subtag = element subtag {text}
tag = element tag {text}
prefix = element prefix {text}
macrolanguage = element macrolanguage {text}
deprecated = element deprecated {xsd:date}
preferred-value = element preferred-value {text}
scope = element scope {text}