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XSD is better at catching errors than XML. An XSD defines elements that can be used in the documents, relating to the actual data with which it is to be encoded. for eg: A date that is expressed as 1/12/2010 can either mean January 12 or December 1st. Declaring a date data type in an XSD document, ensures that it follows the format dictated by XSD.
The XSD file defines which elements and attributes are permitted and in which order. In general XML is a metalanguage. XSD files define specific languages within that metalanguage. For example, if your XSD file contains the definition of XHTML 1.0, then your XML file is required to fit XHTML 1.0 rather than some other format.
Took me a while to get this sorted out - not just xs/xsd - but in general how XML Schemas work. Also, got to know the difference between DTD and XSD. Also, got to know the difference between DTD and XSD.
Also many general IDEs like Eclipse, Visual Studio and Oracle JDeveloper will be able to do this trick. In Eclipse you can right-click the XSD file and choose Open With -> Other... -> XML Schema Editor, although the editor is a little unresponsive browsing a 340kb file. JDeveloper XSD View looks fine.
xsd and xsi Similarities. Both are XML namespace prefixes, abbreviations for an XML namespace. Both are, as are all namespace prefixes, arbitrarily named; other namespace prefix abbreviations could equally well be used. However, both prefixes are conventional and therefore recommended. (An also-conventional alternative to xsd is xs.) xsd and ...
1. @zac: You do if you think of the overall process. (1) Someone reads documenation. (2) sees a change is needed. (3) Go back to the xsd source (4)Update the xsd source (5) Find tool such as XmlSpy to regenerate the documentation. having to get another tool is a burden and limits the use of this form of documentation.
You can restrict the string to a number of chars like this: <xs:annotation>. <xs:documentation>3-char strings only</xs:documentation>. </xs:annotation>. <xs:restriction base="xs:string">. <xs:length value="3"/>. </xs:restriction>. The xs:length in the above limits the length of the string to exactly 3 chars.
To clarify my comment further, I probably should have stated that using javax.xml.validation.SchemaFactory to parse a XSD contained in a string, having a value of maxOccurs within the nonNegativeInteger bounds did not work for larger values.
I have a gigantic QuickBooks SDK .XSD schema file which defines XML requests/responses that I can send/receive from QuickBooks. I'd like to be able to easily generate Java classes from these .XSD files, which I could then use to marshal XML to Java objects, and Java objects to XML.
The default namespace is the one that is not mapped to any prefix. You declare it using: xmlns="a-string-that-is-usually-an-uri". If you have such a declaration in an XML file, any unprefixed element will belong to that namespace. Unprefixed attributes always belong to no namespace.