XSD Tutorials - Herong's Tutorial Examples - v5.23, by Herong Yang
"NOTATION" Datatype Values and Representations
This section describes the built-in primitive datatype, 'NOTATION' that represents custom defined notations to describe non-XML data formats. Whitespaces are allowed and removed.
"NOTATION" is a built-in datatype that represents custom defined notations to describe non-XML data formats with these rules:
To verify these rules, I wrote the first XSD document trying to use "NOTATION" directly:
<?xml version="1.1"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <!-- NOTATION_datatype_test_invalid_1.xsd - Copyright (c) 2002-2013 HerongYang.com. All Rights Reserved. --> <xs:element name="NOTATION_Datatype_Test"> <xs:complexType> <xs:sequence> <xs:element name="NOTATION" type="xs:NOTATION" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> </xs:element> <xs:notation name="jpg" public="image/jpeg" system="PViewer.exe"/> <xs:notation name="gif" public="image/gif" system="PViewer.exe"/> <xs:notation name="wav" public="audio/x-wav" system="MPlayer.exe"/> </xs:schema>
Running my XsdSchemaValidator.java program presented earlier in the book, I get this error:
herong> java XsdSchemaValidator ^^^ NOTATION_datatype_test_invalid_1.xsd any.xml org.xml.sax.SAXParseException; systemId: file:/C:/herong/NOTATION_datatype_test_invalid_1.xsd; lineNumber: 10; columnNumber: 30; enumeration-required-notation: The NOTATION type, 'NOTATION' used by element 'NOTATION', must have an enumeration facet value which specifies the notation elements used by this type. java.lang.NullPointerException
In the second XSD document, I tried to construct an "enumeration" custom datatype based on "NOTATION" referring to an undefined notation name:
<?xml version="1.1"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <!-- NOTATION_datatype_test_invalid_2.xsd - Copyright (c) 2002-2013 HerongYang.com. All Rights Reserved. --> <xs:element name="NOTATION_Datatype_Test"> <xs:complexType> <xs:sequence> <xs:element name="NOTATION" maxOccurs="unbounded"> <xs:simpleType> <xs:restriction base="xs:NOTATION"> <xs:enumeration value="jpg"/> <xs:enumeration value="gif"/> <xs:enumeration value="doc"/> </xs:restriction> </xs:simpleType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> <xs:notation name="jpg" public="image/jpeg" system="PViewer.exe"/> <xs:notation name="gif" public="image/gif" system="PViewer.exe"/> <xs:notation name="wav" public="audio/x-wav" system="MPlayer.exe"/> </xs:schema>
This time XsdSchemaValidator.java gives a different error:
herong> java XsdSchemaValidator ^^^ NOTATION_datatype_test_invalid_2.xsd any.xml org.xml.sax.SAXParseException; systemId: file:/C:/herong/NOTATION_datatype_test_invalid_2.xsd; lineNumber: 14; columnNumber: 42; src-resolve: Cannot resolve the name 'doc' to a(n) 'notation' component. java.lang.NullPointerException
In the third XSD document, I fixed the error and get a valid schema now:
<?xml version="1.1"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <!-- NOTATION_datatype_test_valid.xsd - Copyright (c) 2002-2013 HerongYang.com. All Rights Reserved. --> <xs:element name="NOTATION_Datatype_Test"> <xs:complexType> <xs:sequence> <xs:element name="NOTATION" maxOccurs="unbounded"> <xs:simpleType> <xs:restriction base="xs:NOTATION"> <xs:enumeration value="jpg"/> <xs:enumeration value="gif"/> <xs:enumeration value="wav"/> </xs:restriction> </xs:simpleType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> <xs:notation name="jpg" public="image/jpeg" system="PViewer.exe"/> <xs:notation name="gif" public="image/gif" system="PViewer.exe"/> <xs:notation name="wav" public="audio/x-wav" system="MPlayer.exe"/> </xs:schema>
Here is a sample XML document that can be used to test this XSD document:
<?xml version="1.1"?> <!-- NOTATION_datatype_test.xml - Copyright (c) 2002-2013 HerongYang.com. All Rights Reserved. --> <NOTATION_Datatype_Test> <!-- 3 valid "NOTATION" elements --> <NOTATION> jpg </NOTATION> <NOTATION> wav </NOTATION> <!-- 3 invalid "NOTATION" elements --> <NOTATION> mp3 </NOTATION> </NOTATION_Datatype_Test>
When validating this XML document with my XsdSchemaValidator.java program, I get 1 group of errors for 1 invalid XML element:
herong> java XsdSchemaValidator ^^^ NOTATION_datatype_test_valid.xsd NOTATION_datatype_test.xml Error: Line number: 12 Column number: 34 Message: cvc-enumeration-valid: Value 'mp3' is not facet-valid with respect to enumeration '[jpg, gif, wav]'. It must be a value from the enumeration. Error: Line number: 12 Column number: 34 Message: cvc-type.3.1.3: The value ' mp3 ' of element 'NOTATION' is not valid. Failed with errors: 2
Table of Contents
XML Editor and Schema Processor - XMLPad
Java API for XML Processing - JAXP
JAXP - XML Schema (XSD) Validation
Xerces2 Java Parser - Java API of XML Parsers
Introduction of XSD Built-in Datatypes
"string" and Its Derived Datatypes
"decimal" and Its Derived Datatypes
"dateTime" and Its Related Datatypes
►Miscellaneous Built-in Datatypes
"anyURI" Datatype Values and Representations
"QName" Datatype Values and Representations
►"NOTATION" Datatype Values and Representations
"base64Binary" Datatype Values and Representations
"hexBinary" Datatype Values and Representations
"float" and "double" Datatype Values and Representations
"boolean" Datatype Values and Representations
Facets, Constraining Facets and Restriction Datatypes
"simpleType" - Defining Your Own Simple Datatypes
Identity-Constraints: unique, key and keyref
Assertion as Custom Validation Rules
XML Schema Location and Namespace in XML Documents
Overriding Element Types in XML Documents