xml validation（五）

最新推荐文章于 2025-04-28 00:47:54 发布

vagabond1

最新推荐文章于 2025-04-28 00:47:54 发布

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分类专栏： xml 学习文章标签： validation xml string integer attributes schema

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Unconstrained order

Use the all element instead of sequence can perform no constrain order. It should be mixed content.

< xsd:element name =" subject ">

< xsd:complexType mixed =" true ">

< xsd:all >

< xsd:element name =" i " minOccurs =" 0 " maxOccurs =" 1 " type =" xsd:string " />

< xsd:element name =" b " minOccurs =" 0 " maxOccurs =" 1 " type =" xsd:string " />

</ xsd:all >

</ xsd:complexType >

</ xsd:element >

Notice that maxOccurs has been set to 1, rather than unbounded . This is a requirement for using the all element. The minOccurs and maxOccurs attributes must be either 0 or 1.

Completely unconstrained elements

< xsd:element name =" description " type =" xsd:anyType " />

The complete schema and instance documents

< xsd:schema xmlns:xsd =" http://www.w3.org/2001/XMLSchema ">

< xsd:element name =" memories ">

< xsd:complexType >

< xsd:sequence >

< xsd:element name =" memory " minOccurs = " 0 " maxOccurs =" unbounded " type =" memoryType "/>

</ xsd:sequence >

</ xsd:complexType >

</ xsd:element >

< xsd:complexType name =" memoryType ">

< xsd:sequence >

< xsd:element name =" media ">

< xsd:complexType >

< xsd:attribute name =" mediaid " type =" xsd:integer " />

< xsd:attribute name =" status " type =" mediaType " />

</ xsd:complexType >

</ xsd:element >

< xsd:element name =" subdate " type =" xsd:date "/>

< xsd:element name =" donor " type =" xsd:string "/>

< xsd:element name =" subject ">

< xsd:complexType mixed =" true ">

< xsd:all >

< xsd:element name =" i " minOccurs =" 0 " maxOccurs =" 1 " type =" xsd:string " />

< xsd:element name =" b " minOccurs =" 0 " maxOccurs =" 1 " type =" xsd:string " />

</ xsd:all >

</ xsd:complexType >

</ xsd:element >

< xsd:element name =" location " type =" locationType " />

</ xsd:sequence >

< xsd:attribute name =" tapeid " type =" idNumber " />

< xsd:attribute name =" status " type =" xsd:string " />

</ xsd:complexType >

< xsd:complexType name =" locationType ">

< xsd:choice >

< xsd:element name =" description " type =" xsd:anyType " />

< xsd:element name =" place " type =" xsd:string " />

</ xsd:choice >

</ xsd:complexType >

< xsd:simpleType name =" idNumber ">

< xsd:restriction base =" xsd:integer ">

< xsd:minInclusive value =" 1 " />

< xsd:maxInclusive value =" 100000 " />

</ xsd:restriction >

</ xsd:simpleType >

< xsd:simpleType name =" mediaType ">

< xsd:restriction base =" xsd:string ">

< xsd:enumeration value =" 8mm " />

< xsd:enumeration value =" vhs " />

< xsd:enumeration value =" vhsc " />

< xsd:enumeration value =" digital " />

< xsd:enumeration value =" audio " />

</ xsd:restriction >

</ xsd:simpleType >

</ xsd:schema >

CompleteInstance.xml

<?xml version="1.0" encoding="UTF-8"?>

< memories xmlns:xsi =" http://www.w3.org/2001/XMLSchema-instance " xsi:noNamespaceSchemaLocation =" D:/toh/code/xml/Modifier/CompleteSchema.xsd ">

< memory tapeid =" 1 " status =" status ">

< media mediaid =" 10 " status =" audio "></ media >

< subdate > 2009-09-01 </ subdate >

< donor > John baker </ donor >

< subject >

< i > i </ i >

< b > b </ b >

</ subject >

< location >

< description > description </ description >

</ location >

</ memory >

< memory tapeid =" 2 ">

< media mediaid =" 2 " status =" vhs "/>

< subdate > 2001-05-18 </ subdate >

< donor > Elizabeth Davison </ donor >

< subject > Beach volleyball </ subject >

< location >

< place > Clearwater beach </ place >

</ location >

</ memory >

</ memories >

Section 6. Validation summary

However, XML is a platform-independent means for

representing information; validating parsers are available in C++, Perl, and other languages, and the concepts are the same.