Validación con XML Schema
Motivación
[editar]Se desea utilizar una librería de XML Schema con restricciones para validar un Form.
Ejemplo funcional sample.xhtml
[editar]<?xml version="1.0" encoding="UTF-8"?>
<html
xmlns="http://www.w3.org/1999/xhtml"
xmlns:xf="http://www.w3.org/2002/xforms"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ftype="http://www.example.com/my-file-types">
<head>
<title>Validate Postal Codes</title>
<style type="text/css">
@namespace xf url("http://www.w3.org/2002/xforms");
xf|input {
display: table-row;
line-height: 2em;
}
xf|label {
display: table-cell;
text-align: right;
font-family: Arial, Helvetica, sans-serif;;
font-weight: bold;
padding-right: 5px;
width: 150px;
}
*:required {
background-color: yellow;
}
*:invalid {
background-color: pink;
}
</style>
<xf:model schema="schema.xsd">
<xf:instance src="instance.xml" />
<xf:bind id="zip" required="true()" type="ftype:zipType" nodeset="ftype:zip" />
<xf:bind id="zip2" required="true()" type="ftype:zip2Type" nodeset="ftype:zip2" />
</xf:model>
</head>
<body>
<xf:input bind="zip" incremental="true">
<xf:label>Zip Code: </xf:label>
<xf:hint>Validation is not correctly specified for this field</xf:hint>
<xf:alert>The 'Zip Code' failed to validate!</xf:alert>
</xf:input>
<xf:input bind="zip2" incremental="true">
<xf:label>Zip Code 2: </xf:label>
<xf:hint>Validation is correctly specified for this field</xf:hint>
<xf:alert>
<xf:output value="concat('The &quot;', name(), '&quot; failed to validate!')" />
</xf:alert>
</xf:input>
</body>
</html>
Ejemplo de un archivo XML Schema schema.xsd
[editar]<?xml version="1.0" encoding="UTF-8"?>
<xs:schema
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:ftype="http://www.example.com/my-file-types"
targetNamespace="http://www.example.com/my-file-types"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="data">
<xs:annotation>
<xs:documentation>Test XML Schema</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element name="zip" type="ftype:zipType"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:simpleType name="zipType">
<xs:restriction base="xs:string">
<!-- bad pattern: matches any sequence of 5 digits, even if there are more digits or non-numeric. -->
<xs:pattern value="\d{5}"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="zip2Type">
<xs:restriction base="xs:string">
<!-- good pattern: matches only 5 digits, nothing extra -->
<xs:pattern value="^\d{5}$"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
Sample instance document instance.xml
[editar]<?xml version="1.0" encoding="UTF-8"?>
<data xmlns="http://www.example.com/my-file-types">
<zip>12345</zip>
<zip2>12345</zip2>
</data>
Example XML Schema File schema.xsd
[editar]<?xml version="1.0" encoding="UTF-8"?>
<xs:schema
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:ftype="http://www.example.com/my-file-types"
targetNamespace="http://www.example.com/my-file-types"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="data">
<xs:annotation>
<xs:documentation>Test XML Schema</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element name="zip" type="ftype:zipType"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:simpleType name="zipType">
<xs:restriction base="xs:string">
<!-- bad pattern: matches any sequence of 5 digits, even if there are more digits or non-numeric. -->
<xs:pattern value="\d{5}"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="zip2Type">
<xs:restriction base="xs:string">
<!-- good pattern: matches only 5 digits, nothing extra -->
<xs:pattern value="^\d{5}$"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
Ejemplo de un documento instanciado instance.xml
[editar]<?xml version="1.0" encoding="UTF-8"?>
<data xmlns="http://www.example.com/my-file-types">
<zip>12345</zip>
<zip2>12345</zip2>
</data>