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<?xml version="1.0"?>
<!--
Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
This program and the accompanying materials are made available under the
terms of the Eclipse Distribution License v. 1.0, which is available at
http://www.eclipse.org/org/documents/edl-v10.php.
SPDX-License-Identifier: BSD-3-Clause
-->
<grammar xmlns="http://relaxng.org/ns/structure/1.0"
datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
ns="http://www.w3.org/2001/XMLSchema"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:doc="http://www.jenitennison.com/doc"
xmlns:txw="http://java.sun.com/txw">
<doc:p>
RELAX NG schema for XML Schema by <doc:link
href="mailto:mail@jenitennison.com">Jeni Tennison</doc:link>. Based on
<doc:link href="http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/">XML
Schema Part I: Structures Recommendation</doc:link> and <doc:link
href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/">XML Schema Part
II: Datatypes</doc:link>.
</doc:p>
<doc:changes date="2001-11-24">
<doc:p>
Amended to comply with 10 August 2001 Tutorial.
</doc:p>
<doc:change>Removed key attributes.</doc:change>
<doc:change>Replaced not element with except elements.</doc:change>
<doc:change>
Replaced multiple consecutive optional attributes to use the
zeroOrMore/choice pattern.
</doc:change>
<doc:change>
Removed interleave elements inside list elements (which are no longer
permitted).
</doc:change>
</doc:changes>
<define name="openAttrs" txw:mode="inherit">
<doc:p>
This allows any number of attributes that are not in the XML Schema
namespace or are in no namespace. This is somewhat more complicated than
the XML Schema anyAttribute equivalent.
</doc:p>
<!-- KK don't care -->
<empty/>
<!--zeroOrMore>
<attribute>
<anyName>
<except>
<nsName />
<nsName ns="" />
<name>xml:lang</name>
</except>
</anyName>
<text />
</attribute>
</zeroOrMore-->
</define>
<define name="annotated" txw:mode="inherit">
<doc:p>
This allows any number of attributes that are not in the XML Schema
namespace or are in no namespace, an optional id attribute of type ID,
and an optional annotation element. This is used as the basis for many
element content models.
</doc:p>
<ref name="openAttrs" />
<optional>
<attribute name="id">
<data type="ID" />
</attribute>
</optional>
<optional>
<ref name="annotation" />
</optional>
</define>
<define name="schemaTop" txw:mode="inline">
<doc:p>
This gives the content model of the top level of the schema.
</doc:p>
<choice>
<ref name="redefinable" />
<ref name="topLevelElement" />
<ref name="topLevelAttribute" />
<!--ref name="notation" /-->
</choice>
</define>
<define name="redefinable" txw:mode="inline">
<doc:p>
This gives the components that can be redefined within the redefine
element. They also occur at the top level of the schema.
</doc:p>
<choice>
<ref name="simpleTypeHost" />
<ref name="complexTypeHost" />
<!--ref name="namedGroup" />
<ref name="namedAttributeGroup" /-->
</choice>
</define>
<define name="formChoice">
<doc:p>
This gives the values for the various form attributes:
elementFormDefault and attributeFormDefault on the schema element, and
the form attributes on the element and attribute elements.
</doc:p>
<choice>
<value>qualified</value>
<value>unqualified</value>
</choice>
</define>
<!-- KK: merge the two -->
<define name="reducedDerivationControl">
<doc:p>
This gives the values that can be taken in the lists used to control
derivation by extension or restriction (this is 'reduced' derivation
because some derivation can involve substitution). This RELAX NG schema,
like the XML Schema Recommendation here, allows the keywords 'extension' and
'restriction' to be repeated any number of times.
</doc:p>
<list>
<oneOrMore>
<choice>
<value>extension</value>
<value>restriction</value>
</choice>
</oneOrMore>
</list>
</define>
<define name="derivationSet">
<doc:p>
This specifies the possible values for attributes that control derivation.
</doc:p>
<choice>
<value>#all</value>
<ref name="reducedDerivationControl" />
</choice>
</define>
<start>
<doc:p>
This is the beginning point for the schema, and defines the schema
element.
</doc:p>
<element name="schema"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-schema">
<ref name="openAttrs" />
<zeroOrMore>
<choice>
<attribute name="version">
<data type="token" />
</attribute>
<attribute name="finalDefault">
<ref name="derivationSet" />
</attribute>
<attribute name="blockDefault">
<ref name="blockSet" />
</attribute>
<attribute name="attributeFormDefault">
<ref name="formChoice" />
</attribute>
<attribute name="elementFormDefault">
<ref name="formChoice" />
</attribute>
<attribute name="id">
<data type="ID" />
</attribute>
<attribute name="xml:lang">
<data type="language" />
</attribute>
<attribute name="targetNamespace">
<data type="anyURI" />
</attribute>
</choice>
</zeroOrMore>
<zeroOrMore>
<choice>
<!--ref name="include" /-->
<ref name="import" />
<!--ref name="redefine" /-->
<ref name="annotation" />
</choice>
</zeroOrMore>
<zeroOrMore>
<choice>
<ref name="schemaTop" />
<ref name="annotation" />
</choice>
</zeroOrMore>
</element>
</start>
<define name="allNNI">
<doc:p>
This gives the value type for the maxOccurs attribute, which may be a
non-negative number or the keyword 'unbounded'.
</doc:p>
<choice>
<data type="nonNegativeInteger" />
<value type="token">unbounded</value>
</choice>
</define>
<define name="occurs" txw:mode="inherit">
<doc:p>
This specifies the occurs attributes, minOccurs and maxOccurs, as they
are normally used.
</doc:p>
<zeroOrMore>
<choice>
<attribute name="minOccurs">
<data type="nonNegativeInteger" />
</attribute>
<attribute name="maxOccurs">
<ref name="allNNI" />
</attribute>
</choice>
</zeroOrMore>
</define>
<define name="typeDefParticle" txw:mode="inline">
<doc:p>
This gives the possible content of complex types.
</doc:p>
<choice>
<!--ref name="groupRef" /-->
<ref name="all" />
<ref name="choice" />
<ref name="sequence" />
</choice>
</define>
<define name="nestedParticle" txw:mode="inline">
<doc:p>
This gives the particles that can make up a model group.
</doc:p>
<choice>
<ref name="localElement" />
<!--ref name="groupRef" /-->
<ref name="choice" />
<ref name="sequence" />
<ref name="any" />
</choice>
</define>
<define name="fixedOrDefault" txw:mode="inline">
<doc:p>
This specifies the relationship between fixed and default attributes on
element and attribute elements - if one is present, then the other cannot
be. This is a constraint that cannot be specified using XML Schema.
</doc:p>
<choice>
<empty />
<attribute name="fixed" />
<attribute name="default" />
</choice>
</define>
<define name="attributeType" txw:mode="inherit">
<doc:p>
This specifies the relationship between the type attribute and the
simpleType element child of attribute elements - if one is present, then
the other cannot be, although it is possible for neither to be allowed.
</doc:p>
<choice>
<empty />
<attribute name="type">
<data type="QName" />
</attribute>
<ref name="simpleTypeHost" />
</choice>
</define>
<define name="localAttribute">
<doc:p>
This describes attribute elements when used in a local context. They
have an optional use attribute, possibly a fixed or default attribute,
and then can either have a ref attribute (referring to a top-level
attribute) or a name attribute with an optional form attribute and
specifying an attribute type.
</doc:p>
<element name="attribute"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-attribute">
<ref name="annotated" />
<optional>
<attribute name="use">
<choice>
<value type="token">optional</value>
<value type="token">prohibited</value>
<value type="token">required</value>
</choice>
</attribute>
</optional>
<ref name="fixedOrDefault" />
<choice>
<attribute name="ref">
<data type="QName" />
</attribute>
<group>
<attribute name="name">
<data type="NCName" />
</attribute>
<optional>
<attribute name="form">
<ref name="formChoice" />
</attribute>
</optional>
<ref name="attributeType" />
</group>
</choice>
</element>
</define>
<define name="topLevelAttribute">
<doc:p>
This describes attribute elements when used at the top level of the
schema. They must have a name, may have a fixed or default attribute,
and specify their type through a type attribute or child simpleType
element. The name attribute of each attribute element that appears at
the top level of the schema is unique.
</doc:p>
<element name="attribute"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-attribute">
<ref name="annotated" />
<attribute name="name">
<data type="NCName" />
</attribute>
<ref name="fixedOrDefault" />
<ref name="attributeType" />
</element>
</define>
<define name="attrDecls" txw:mode="inherit">
<doc:p>
This gives the model group for specifying the attributes in a complex
type, an extension or restriction.
</doc:p>
<zeroOrMore>
<choice>
<ref name="localAttribute" />
<!--ref name="attributeGroupRef" /-->
</choice>
</zeroOrMore>
<optional>
<ref name="anyAttribute" />
</optional>
</define>
<define name="anyAttribute">
<doc:p>
This specifies the anyAttribute wildcard.
</doc:p>
<element name="anyAttribute"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-anyAttribute">
<ref name="wildcard" />
</element>
</define>
<define name="complexTypeModel" txw:mode="inherit">
<doc:p>
This specifies the content of a complexType element. As children, it can
have a simpleContent, a complexContent or a model group. Only if it has
one of the latter two, may it have a mixed attribute. This latter
constraint is something that cannot be specified in XML Schema.
</doc:p>
<choice>
<ref name="simpleContent" />
<group>
<optional>
<attribute name="mixed">
<data type="boolean" />
</attribute>
</optional>
<choice>
<ref name="complexContent" />
<group>
<optional>
<ref name="typeDefParticle" />
</optional>
<ref name="attrDecls" />
</group>
</choice>
</group>
</choice>
</define>
<define name="complexTypeHost" txw:mode="inherit">
<ref name="typeHost" />
<ref name="complexType" />
</define>
<define name="typeHost" txw:mode="inherit"><empty/><empty/></define>
<define name="complexType" txw:mode="inherit">
<element name="complexType"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-complexType">
<doc:p>
This specifies the basic content of a complexType element.
</doc:p>
<ref name="annotated" />
<ref name="complexTypeModel" />
<optional>
<attribute name="name">
<data type="NCName" />
</attribute>
</optional>
<zeroOrMore>
<choice>
<attribute name="abstract">
<data type="boolean" />
</attribute>
<attribute name="block">
<ref name="derivationSet" />
</attribute>
<attribute name="final">
<ref name="derivationSet" />
</attribute>
</choice>
</zeroOrMore>
</element>
</define>
<define name="complexRestriction">
<doc:p>
This describes a restriction element within a complexContent element
(i.e. one that restricts a complex type). It has a base attribute, may
contain a model group and may contain attribute declarations of various
sorts.
</doc:p>
<element name="restriction"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-complexContent::restriction">
<ref name="annotated" />
<attribute name="base">
<data type="QName" />
</attribute>
<optional>
<ref name="typeDefParticle" />
</optional>
<ref name="attrDecls" />
</element>
</define>
<define name="extensionType">
<doc:p>
This specifies the basic model for an extension element: adding a
required base attribute to the model used for most components.
</doc:p>
<ref name="annotated" />
<attribute name="base">
<data type="QName" />
</attribute>
</define>
<define name="complexExtension">
<doc:p>
This describes an extension element within a complexContent element
(i.e. one that restricts a complex type). It may contain a model group
and may contain attribute declarations of various sorts.
</doc:p>
<element name="extension"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-complexContent::extension">
<ref name="extensionType" />
<optional>
<ref name="typeDefParticle" />
</optional>
<ref name="attrDecls" />
</element>
</define>
<define name="complexContent">
<doc:p>
This describes a complexContent element. It may have a mixed attribute,
and either a restriction or extension element as content.
</doc:p>
<element name="complexContent"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-complexContent">
<ref name="annotated" />
<optional>
<attribute name="mixed">
<data type="boolean" />
</attribute>
</optional>
<choice>
<ref name="complexRestriction" />
<ref name="complexExtension" />
</choice>
</element>
</define>
<define name="simpleRestriction">
<doc:p>
This describes a restriction element that appears within a simpleContent
or simpleType element (i.e. one that restricts a simple type). Its
content follows the simple restriction model that is detailed below, and
may include attribute declarations.
</doc:p>
<element name="restriction"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-simpleContent::restriction">
<ref name="annotated" />
<ref name="simpleRestrictionModel" />
<ref name="attrDecls" />
</element>
</define>
<define name="simpleExtension">
<doc:p>
This describes an extension element that appears within a simpleContent
element (i.e. one that extends a simple type). Like other extensions, it
has a base type, but it can only be used to add attributes.
</doc:p>
<element name="extension"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-simpleContent::extension">
<ref name="extensionType" />
<ref name="attrDecls" />
</element>
</define>
<define name="simpleContent">
<doc:p>
This describes a simpleContent element, whose content can either hold a
restriction or extension element.
</doc:p>
<element name="simpleContent"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-simpleContent">
<ref name="annotated" />
<choice>
<ref name="simpleRestriction" />
<ref name="simpleExtension" />
</choice>
</element>
</define>
<define name="blockSet">
<doc:p>
This gives the possible values for block attributes on element elements,
which includes substitution amongst the list of possible values. This
RELAX NG schema, like the XML Schema Recommendation, allows each of the
keywords 'extension', 'restriction' and 'substitution' to occur more than
once within the list.
</doc:p>
<choice>
<value type="token">#all</value>
<list>
<oneOrMore>
<choice>
<value>extension</value>
<value>restriction</value>
<value>substitution</value>
</choice>
</oneOrMore>
</list>
</choice>
</define>
<define name="element" txw:mode="inherit">
<doc:p>
This describes the basic content model of an element element. It is
annotated, may have a fixed or default attribute, and may have nillable
and/or block attributes. Its type may be specified through a type
attribute, a local simple type or a local complex type - the choice
between these methods is something that cannot be indicated with XML
Schema. This content is optionally followed by some identify constraints.
</doc:p>
<ref name="annotated" />
<ref name="fixedOrDefault" />
<zeroOrMore>
<choice>
<attribute name="nillable">
<data type="boolean" />
</attribute>
<attribute name="block">
<ref name="blockSet" />
</attribute>
</choice>
</zeroOrMore>
<choice>
<empty />
<attribute name="type">
<data type="QName" />
</attribute>
<ref name="simpleTypeHost" />
<ref name="complexTypeHost" />
</choice>
<!--zeroOrMore>
<ref name="identityConstraint" />
</zeroOrMore-->
</define>
<define name="topLevelElement">
<doc:p>
This describes an element element that appears at the top level of the
schema. On top of the basic content for an element element, it has to
have a name, which is a unique identifier in the element symbol space. It
may have substitutionGroup, abstract and/or final attributes.
</doc:p>
<element name="element"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-element">
<ref name="element" />
<attribute name="name">
<data type="NCName" />
</attribute>
<zeroOrMore>
<choice>
<attribute name="substitutionGroup">
<data type="QName" />
</attribute>
<attribute name="abstract">
<data type="boolean" />
</attribute>
<attribute name="final">
<ref name="derivationSet" />
</attribute>
</choice>
</zeroOrMore>
</element>
</define>
<define name="localElement">
<doc:p>
This describes an element element that appears locally, within a
complexType or group element. It may have minOccurs and/or maxOccurs
attributes. If it has a ref attribute, then that&apos;s all it can
have. Otherwise, it must have a name and specifies its type in the same
way as the basic element content model described above. It may in this
case also have a form element. These constraints on local elements
cannot be described within XML Schema.
</doc:p>
<element name="element"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-element">
<ref name="occurs" />
<choice>
<attribute name="ref">
<data type="QName" />
</attribute>
<group>
<ref name="element" />
<attribute name="name">
<data type="NCName" />
</attribute>
<optional>
<attribute name="form">
<ref name="formChoice" />
</attribute>
</optional>
</group>
</choice>
</element>
</define>
<!--define name="namedGroup">
<doc:p>
This describes an group element that appears at the top level of the
schema. It must have a name attribute, and must have one of an all,
choice or sequence element child.
</doc:p>
<element name="group"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-group">
<ref name="annotated" />
<attribute name="name">
<data type="NCName" />
</attribute>
<choice>
<element name="all">
<ref name="simpleExplicitGroup" /> <!- - RS - relaxed all content model - ->
</element>
<element name="choice">
<ref name="simpleExplicitGroup" />
</element>
<element name="sequence">
<ref name="simpleExplicitGroup" />
</element>
</choice>
</element>
</define-->
<!--define name="groupRef">
<doc:p>
This describes group element that occurs locally, referring to a
top-level named group. It may have occurrence attributes, and must have
a ref attribute.
</doc:p>
<element name="group"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-group">
<ref name="annotated" />
<ref name="occurs" />
<attribute name="ref">
<data type="QName" />
</attribute>
</element>
</define-->
<define name="explicitGroup" txw:mode="inherit">
<doc:p>
This gives the content of a model group (not a group element) in the
normal run of things. It has occurrence attributes and any number of
particles within it.
</doc:p>
<ref name="annotated" />
<ref name="occurs" />
<zeroOrMore>
<ref name="nestedParticle" />
</zeroOrMore>
</define>
<define name="simpleExplicitGroup">
<doc:p>
This gives the content of a model group (not a group element) within a
named group - it differs from the above in that it doesn&apos;t have any
occurrence attributes.
</doc:p>
<ref name="annotated" />
<zeroOrMore>
<ref name="nestedParticle" />
</zeroOrMore>
</define>
<define name="all">
<doc:p>
This describes an all element that appears outside a named group (i.e. as
the content of a complexType element). It has the standard model for an
all element, but adds minOccurs and maxOccurs attributes which can only
take certain values.
</doc:p>
<element name="all"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-all">
<ref name="explicitGroup" />
</element>
</define>
<define name="choice">
<doc:p>
This describes a choice element that appears outside a named group.
</doc:p>
<element name="choice"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-choice">
<ref name="explicitGroup" />
</element>
</define>
<define name="sequence">
<doc:p>
This describes a sequence element that appears outside a named group.
</doc:p>
<element name="sequence"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-sequence">
<ref name="explicitGroup" />
</element>
</define>
<define name="wildcard" txw:mode="inherit">
<doc:p>
This describes a wildcard element (i.e. any or anyAttribute). The
namespace attribute can take a list URIs interspersed with the keywords
'##targetNamespace' and/or '##local'. This RELAX NG schema, like the XML
Schema Recommendation, allows the keywords to be specified more than once
each within the list, if they&apos;re given. This model also specifies the
processContents attribute.
</doc:p>
<ref name="annotated" />
<zeroOrMore>
<choice>
<attribute name="namespace">
<choice>
<value type="token">##any</value>
<value type="token">##other</value>
<list>
<zeroOrMore>
<choice>
<data type="anyURI" />
<value>##targetNamespace</value>
<value>##local</value>
</choice>
</zeroOrMore>
</list>
</choice>
</attribute>
<attribute name="processContents">
<choice>
<value type="token">lax</value>
<value type="token">skip</value>
<value type="token">strict</value>
</choice>
</attribute>
</choice>
</zeroOrMore>
</define>
<define name="any">
<doc:p>
This describes an any element as a wildcard.
</doc:p>
<element name="any"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-any">
<ref name="wildcard" />
<ref name="occurs" />
</element>
</define>
<!--define name="namedAttributeGroup">
<doc:p>
This describes an attributeGroup element as it appears at the top level
of the schema. It must have a name attribute, and then contains
attribute declarations.
</doc:p>
<element name="attributeGroup"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-attributeGroup">
<ref name="annotated" />
<attribute name="name">
<data type="NCName" />
</attribute>
<ref name="attrDecls" />
</element>
</define-->
<!--define name="attributeGroupRef">
<doc:p>
This describes an attributeGroup element as it appears within a complex
type. It must have a ref attribute.
</doc:p>
<element name="attributeGroup"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-attributeGroup">
<ref name="annotated" />
<attribute name="ref">
<data type="QName" />
</attribute>
</element>
</define-->
<!--define name="include">
<doc:p>
This describes an include element, which must have a schemaLocation
attribute.
</doc:p>
<element name="include"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-include">
<ref name="annotated" />
<attribute name="schemaLocation">
<data type="anyURI" />
</attribute>
</element>
</define-->
<!--define name="redefine">
<doc:p>
This describes a redefine element, which must have a schemaLocation
attribute and can then contain any mix of annotations and redefinable
components.
</doc:p>
<element name="redefine"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-redefine">
<ref name="openAttrs" />
<optional>
<attribute name="id">
<data type="ID" />
</attribute>
</optional>
<attribute name="schemaLocation">
<data type="anyURI" />
</attribute>
<zeroOrMore>
<choice>
<ref name="annotation" />
<ref name="redefinable" />
</choice>
</zeroOrMore>
</element>
</define-->
<define name="import">
<doc:p>
This describes an import element that&apos;s used when its parent schema
element specifies a targetNamespace. In these cases, the namespace
attribute on the import element is optional.
</doc:p>
<element name="import"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-import">
<ref name="annotated" />
<optional>
<attribute name="schemaLocation">
<data type="anyURI" />
</attribute>
</optional>
<optional>
<attribute name="namespace">
<data type="anyURI" />
</attribute>
</optional>
</element>
</define>
<!--define name="selector">
<doc:p>
This describes a selector element. The xpath attribute is a simplified
XPath - the regular expression given here is the one from the XML Schema
for XML Schema.
</doc:p>
<element name="selector"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-selector">
<ref name="annotated" />
<attribute name="xpath">
<data type="token">
<param name="pattern">(\.//)?(((child::)?((\i\c*:)?(\i\c*|\*)))|\.)(/(((child::)?((\i\c*:)?(\i\c*|\*)))|\.))*(\|(\.//)?(((child::)?((\i\c*:)?(\i\c*|\*)))|\.)(/(((child::)?((\i\c*:)?(\i\c*|\*)))|\.))*)*</param>
</data>
</attribute>
</element>
</define>
<define name="field">
<doc:p>
This describes a field element. The xpath attribute is a simplified
XPath - the regular expression given here is the one from the XML Schema
for XML Schema.
</doc:p>
<element name="field"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-field">
<ref name="annotated" />
<attribute name="xpath">
<data type="token">
<param name="pattern">(\.//)?((((child::)?((\i\c*:)?(\i\c*|\*)))|\.)/)*((((child::)?((\i\c*:)?(\i\c*|\*)))|\.)|((attribute::|@)((\i\c*:)?(\i\c*|\*))))(\|(\.//)?((((child::)?((\i\c*:)?(\i\c*|\*)))|\.)/)*((((child::)?((\i\c*:)?(\i\c*|\*)))|\.)|((attribute::|@)((\i\c*:)?(\i\c*|\*)))))*</param>
</data>
</attribute>
</element>
</define>
<define name="keybase" txw:mode="inherit">
<doc:p>
This gives the basic content for identity constraints - a name attribute
that uniquely identifies the identity constraint, a selector element and
one or more field elements.
</doc:p>
<ref name="annotated" />
<attribute name="name">
<data type="NCName" />
</attribute>
<ref name="selector" />
<oneOrMore>
<ref name="field" />
</oneOrMore>
</define>
<define name="identityConstraint" txw:mode="inline">
<doc:p>
This gives a model group for the three identity constraint elements, used
within the content of element elements.
</doc:p>
<choice>
<ref name="unique" />
<ref name="key" />
<ref name="keyref" />
</choice>
</define>
<define name="unique">
<doc:p>
This describes a unique element.
</doc:p>
<element name="unique"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-unique">
<ref name="keybase" />
</element>
</define>
<define name="key">
<doc:p>
This describes a key element.
</doc:p>
<element name="key"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-key">
<ref name="keybase" />
</element>
</define>
<define name="keyref">
<doc:p>
This describes a keyref element.
</doc:p>
<element name="keyref"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-keyref">
<ref name="keybase" />
<attribute name="refer">
<data type="QName" />
</attribute>
</element>
</define-->
<!--define name="notation">
<doc:p>
This describes a notation element. The names of notation elements are
unique in the notation symbol space. The public attribute is required,
and the system attribute is optional.
</doc:p>
<element name="notation"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-notation">
<ref name="annotated" />
<attribute name="name">
<data type="NCName" />
</attribute>
<attribute name="public">
<data type="token" />
</attribute>
<optional>
<attribute name="system">
<data type="anyURI" />
</attribute>
</optional>
</element>
</define-->
<define name="appinfoContent">
<doc:p>
This is designed to describe the content of the appinfo elements in the
schema. At the moment this allows any mixed content without validation.
Note that this is fairly complex compared to the XML Schema equivalent,
which would be a single any element.
</doc:p>
<ref name="anyContent" />
</define>
<define name="anyContent">
<empty/> <!-- KK don't care -->
<!--mixed>
<zeroOrMore>
<element>
<anyName />
<zeroOrMore>
<attribute>
<anyName />
</attribute>
</zeroOrMore>
<ref name="anyContent" />
<empty />
</element>
</zeroOrMore>
</mixed-->
</define>
<define name="appinfo">
<doc:p>
This describes an appinfo element. It has an optional source attribute
and can currently contain anything at all.
</doc:p>
<element name="appinfo"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-appinfo">
<optional>
<attribute name="source">
<data type="anyURI" />
</attribute>
</optional>
<ref name="appinfoContent" />
</element>
</define>
<define name="documentationContent">
<doc:p>
This is designed to describe the content of the documentation elements in
the schema. At the moment this allows any mixed content without
validation. Note that this is fairly complex compared to the XML Schema
equivalent, which would be a single any element.
</doc:p>
<ref name="anyContent" />
</define>
<define name="documentation">
<doc:p>
This describes a documentation element. It has optional source
and xml:lang attributes and can currently contain anything at all.
</doc:p>
<element name="documentation"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-documentation">
<zeroOrMore>
<choice>
<attribute name="source">
<data type="anyURI" />
</attribute>
<attribute name="xml:lang">
<data type="language" />
</attribute>
</choice>
</zeroOrMore>
<ref name="documentationContent" />
</element>
</define>
<define name="annotation">
<doc:p>
This describes an annotation element. It can have any attributes, may
have an id attribute, and contains any number of documentation or appinfo
elements.
</doc:p>
<element name="annotation"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-annotation">
<ref name="openAttrs" />
<optional>
<attribute name="id">
<data type="ID" />
</attribute>
</optional>
<zeroOrMore>
<choice>
<ref name="documentation" />
<ref name="appinfo" />
</choice>
</zeroOrMore>
</element>
</define>
<define name="simpleDerivation" txw:mode="inline">
<doc:p>
This gives the various types of derivation of simple types.
</doc:p>
<choice>
<ref name="simpleRestriction" />
<ref name="list" />
<ref name="union" />
</choice>
</define>
<define name="simpleDerivationSet">
<doc:p>
This specifies the values of the final attribute for simple types. This
RELAX NG schema for XML Schema, like the XML Schema Recommendation, allows
the keywords 'list', 'union' and 'restriction' to appear more than once
within the list.
</doc:p>
<choice>
<value type="token">#all</value>
<list>
<zeroOrMore>
<choice>
<value>list</value>
<value>union</value>
<value>restriction</value>
</choice>
</zeroOrMore>
</list>
</choice>
</define>
<define name="simpleTypeHost" txw:mode="inherit">
<ref name="typeHost" />
<ref name="simpleType" />
</define>
<define name="simpleType" txw:mode="inherit">
<doc:p>
This gives the basic content of a simple type.
</doc:p>
<element name="simpleType"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-simpleType">
<ref name="annotated" />
<ref name="simpleDerivation" />
<optional>
<attribute name="name">
<data type="NCName" />
</attribute>
</optional>
<optional>
<attribute name="final">
<ref name="simpleDerivationSet" />
</attribute>
</optional>
</element>
</define>
<!--define name="rangeFacets" txw:mode="inherit">
<doc:p>
This describes the relationship between the various range facets. Only
one of minExclusive and minInclusive can be present, and only one of
maxExclusive and maxInclusive can be present. This is a constraint that
can&apos;t easily be expressed using XML Schema. This RELAX NG schema
for XML Schema is a little more restrictive than the XML Schema
Recommendation in that it also forces there to be a maximum of one of
each of these types of facets.
</doc:p>
<interleave>
<optional>
<choice>
<ref name="minExclusive" />
<ref name="minInclusive" />
</choice>
</optional>
<optional>
<choice>
<ref name="maxExclusive" />
<ref name="maxInclusive" />
</choice>
</optional>
</interleave>
</define>
<define name="digitFacets" txw:mode="inherit">
<doc:p>
This specifies optional totalDigits and fractionDigits elements. This
RELAX NG schema for XML Schema is a little more restrictive than the XML
Schema Recommendation in that it also forces there to be a maximum of one
of each of these types of facets.
</doc:p>
<optional>
<ref name="totalDigits" />
</optional>
<optional>
<ref name="fractionDigits" />
</optional>
</define>
<define name="lengthFacets" txw:mode="inherit">
<doc:p>
This specifies optional length, minLength and maxLength elements. This
RELAX NG schema for XML Schema is a little more restrictive than the XML
Schema Recommendation in that it also forces there to be a maximum of one
of each of these types of facets, and says that if a length element is
given, then neither minLength nor maxLength should be present.
</doc:p>
<choice>
<ref name="length" />
<interleave>
<optional>
<ref name="minLength" />
</optional>
<optional>
<ref name="maxLength" />
</optional>
</interleave>
</choice>
</define>
<define name="commonFacets" txw:mode="inherit">
<doc:p>
This specifies zero or more enumeration or pattern elements and an
optional whiteSpace element. This RELAX NG schema for XML Schema is a
little more restrictive than the XML Schema Recommendation in that it
also forces there to be a maximum of one whiteSpace element within the
facets. Note that the whiteSpace facet is constrained to have a value of
'collapse'.
</doc:p>
<zeroOrMore>
<ref name="enumeration" />
</zeroOrMore>
<optional>
<ref name="whiteSpaceCollapse" />
</optional>
<zeroOrMore>
<ref name="pattern" />
</zeroOrMore>
</define-->
<define name="simpleRestrictionModel">
<doc:p>
This specifies the types of facets that are valid in restrictions on the
built-in data types. This can only perform rudimentary checking, but
should be enough in most circumstances. Note that for xs:anySimpleType
and xs:string, the whiteSpace facet can take any value, for
xs:normalizedString it can be 'replace' or 'collapse', and for all other
built-in types it has to be 'collapse'.
</doc:p>
<choice>
<attribute name="base">
<data type="QName" />
</attribute>
<ref name="simpleTypeHost" />
</choice>
<interleave>
<!--ref name="rangeFacets" />
<ref name="digitFacets" />
<ref name="lengthFacets" />
<optional>
<ref name="whiteSpace" />
</optional-->
<zeroOrMore>
<ref name="enumeration" />
</zeroOrMore>
<!--zeroOrMore>
<ref name="pattern" />
</zeroOrMore-->
</interleave>
</define>
<define name="list">
<doc:p>
This describes a list element. It can either specify a local simple type
or have a itemType attribute. This constraint cannot be expressed in XML
Schema.
</doc:p>
<element name="list"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-list">
<ref name="annotated" />
<choice>
<ref name="simpleTypeHost" />
<attribute name="itemType">
<data type="QName" />
</attribute>
</choice>
</element>
</define>
<define name="union">
<doc:p>
This describes a union element. If the memberTypes attribute is missing
or empty, then it must contain one or more simpleType elements; if
it&apos;s present, then it can contain simpleType elements or list simple
types in the memberTypes attribute. This constraint cannot be expressed
in XML Schema.
</doc:p>
<element name="union"
doc:href="http://www.w3.org/TR/xmlschema-1/#element-union">
<ref name="annotated" />
<choice>
<group>
<attribute name="memberTypes">
<list>
<oneOrMore>
<data type="QName" />
</oneOrMore>
</list>
</attribute>
<zeroOrMore>
<ref name="simpleTypeHost" />
</zeroOrMore>
</group>
<group>
<optional>
<attribute name="memberTypes">
<empty />
</attribute>
</optional>
<oneOrMore>
<ref name="simpleTypeHost" />
</oneOrMore>
</group>
</choice>
</element>
</define>
<define name="facet" txw:mode="inherit">
<doc:p>
This is the basic content of a facet. It has an optional fixed attribute.
</doc:p>
<ref name="annotated" />
<optional>
<attribute name="fixed">
<data type="boolean" />
</attribute>
</optional>
</define>
<define name="noFixedFacet" txw:mode="inherit">
<doc:p>
This is the content of a facet that cannot be fixed (enumeration or
pattern). It has a value attribute that can take any kind of value.
</doc:p>
<ref name="annotated" />
<attribute name="value" />
</define>
<!--define name="rangeFacet">
<doc:p>
This is the content of a range facet. The value must be one of the data
types shown (as these are the only types of data that accept ranges). I
haven&apos;t gone so far as to indicate the data type of the value
attribute of a range facet according to the base type as this would be
very complicated (although it would be possible in RELAX NG).
</doc:p>
<ref name="facet" />
<attribute name="value">
<choice>
<data type="decimal" />
<data type="float" />
<data type="double" />
<data type="duration" />
<data type="dateTime" />
<data type="time" />
<data type="date" />
<data type="gYearMonth" />
<data type="gYear" />
<data type="gMonthDay" />
<data type="gMonth" />
<data type="gDay" />
</choice>
</attribute>
</define>
<define name="minExclusive">
<doc:p>
This describes a minExclusive element.
</doc:p>
<element name="minExclusive"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-minExclusive">
<ref name="rangeFacet" />
</element>
</define>
<define name="minInclusive">
<doc:p>
This describes a minInclusive element.
</doc:p>
<element name="minInclusive"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-minInclusive">
<ref name="rangeFacet" />
</element>
</define>
<define name="maxExclusive">
<doc:p>
This describes a maxExclusive element.
</doc:p>
<element name="maxExclusive"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-maxExclusive">
<ref name="rangeFacet" />
</element>
</define>
<define name="maxInclusive">
<doc:p>
This describes a maxInclusive element.
</doc:p>
<element name="maxInclusive"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-maxInclusive">
<ref name="rangeFacet" />
</element>
</define>
<define name="numFacet">
<doc:p>
This is the content of a numerical facet.
</doc:p>
<ref name="facet" />
<attribute name="value">
<data type="nonNegativeInteger" />
</attribute>
</define>
<define name="totalDigits">
<doc:p>
This describes a totalDigits element. The value attribute must take a
positive integer.
</doc:p>
<element name="totalDigits"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-totalDigits">
<ref name="facet" />
<attribute name="value">
<data type="positiveInteger" />
</attribute>
</element>
</define>
<define name="fractionDigits">
<doc:p>
This describes a fractionDigits element.
</doc:p>
<element name="fractionDigits"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-fractionDigits">
<ref name="numFacet" />
</element>
</define>
<define name="length">
<doc:p>
This describes a length element.
</doc:p>
<element name="length"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-length">
<ref name="numFacet" />
</element>
</define>
<define name="minLength">
<doc:p>
This describes a minLength element.
</doc:p>
<element name="minLength"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-minLength">
<ref name="numFacet" />
</element>
</define>
<define name="maxLength">
<doc:p>
This describes a maxLength element.
</doc:p>
<element name="maxLength"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-maxLength">
<ref name="numFacet" />
</element>
</define-->
<define name="enumeration">
<doc:p>
This describes an enumeration element.
</doc:p>
<element name="enumeration"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-enumeration">
<ref name="noFixedFacet" />
</element>
</define>
<!--define name="whiteSpace">
<doc:p>
This describes a whiteSpace element that can take any of the permitted
values.
</doc:p>
<element name="whiteSpace"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-whiteSpace">
<ref name="facet" />
<attribute name="value">
<choice>
<value type="token">preserve</value>
<value type="token">replace</value>
<value type="token">collapse</value>
</choice>
</attribute>
</element>
</define>
<define name="whiteSpaceReplaceOrCollapse">
<doc:p>
This describes a whiteSpace element that can only take the values
'replace' or 'collapse'.
</doc:p>
<element name="whiteSpace"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-whiteSpace">
<ref name="facet" />
<attribute name="value">
<choice>
<value type="token">replace</value>
<value type="token">collapse</value>
</choice>
</attribute>
</element>
</define>
<define name="whiteSpaceCollapse">
<doc:p>
This describes a whiteSpace element that can only take the value
'collapse'.
</doc:p>
<element name="whiteSpace"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-whiteSpace">
<ref name="facet" />
<attribute name="value">
<value type="token">collapse</value>
</attribute>
</element>
</define>
<define name="pattern">
<doc:p>
This describes a pattern element.
</doc:p>
<element name="pattern"
doc:href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html#element-pattern">
<ref name="noFixedFacet" />
</element>
</define-->
</grammar>