xsd - xml schema restriction list with different sub elements by value -

xsd - xml schema restriction list with different sub elements by value -

i create element has different subelements depending on value of 1 of these elements. wonder if , how can accomplish (best possible solution). if type piece there must weight element. if type kilogram or gram or ... not need it.

<?xml version="1.0" encoding="utf-8"?> <amounts> <amount> <type>piece</type> <value>6</value> <weight> <value>1.5</value> <type>liter</type> </weight> </amount> <amount> <type>kilogram</type> <value>0.610</value> </amount> </amounts>

so thought might this, errors (see below).

<?xml version="1.0" encoding="utf-8"?> <schema xmlns="http://www.w3.org/2001/xmlschema" targetnamespace="http://www.test.org/amount" xmlns:amount="http://www.test.org/amount" elementformdefault='qualified'> <element name="amount"> <complextype> <choice> <group ref="amount:kilogram" /> <group ref="amount:piece" /> </choice> </complextype> </element> <group name="kilogram"> <sequence> <element name="type" fixed="kilogram" /> <element name="value" type="float" /> </sequence> </group> <group name="piece"> <sequence> <element name="type" fixed="piece" /> <element name="value" type="int" /> <element name="weight"> <complextype> <sequence> <element name="type" type="amount:amounttype" /> <element name="value" type="float" /> </sequence> </complextype> </element> </sequence> </group> <simpletype name="amounttype"> <restriction base="string"> <enumeration value="kg" /> <enumeration value="g" /> <enumeration value="mg" /> <enumeration value="lb" /> </restriction> </simpletype> </schema>

error @ line 5 is:

multiple annotations found @ line: - cos-nonambig: "http://www.test.org/amount":type , "http://www.test.org/amount":type (or elements substitution group) violate "unique particle attribution". during validation against schema, ambiguity created 2 particles. - cos-element-consistent: error type '#anontype_amount'. multiple elements name 'value', different types, appear in model group.

if made "type" attribute rather element, in xsd 1.1 using conditional type assignment. otherwise, sorry, you're out of luck.

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