XML -
<?xml version="1.0" encoding="utf-8" ?>
<tns:q1 xmlns:tns="http://tempuri.org/XMLSchema2.xsd"
id="s1.q1" description="" text="How would you rate the system of nuclear laws and regulations in force in the State with respect to safeguards implementation?" isAnsewerRequired="true" condition="/tns:choices">
<tns:choices>
<tns:c1 id="s1.q1.c1" text="Complete and exhaustive" description="No action is needed." isCommentRequired="false" >false</tns:c1>
<tns:c2 id="s1.q1.c2" text="Overall satisfactory" description="There is a sufficient system of laws and regulations; however, there are few aspects which are not covered (for instance on exempted material, small quantities, extent of authority, etc.)." isCommentRequired="false">false</tns:c2>
<tns:c3 id="s1.q1.c3" text="Insufficient" description="The system of laws and regulations is not sufficient to support effective SG implementation." isCommentRequired="true">false</tns:c3>
<tns:c4 id="s1.q1.c4" text="Not existent or largely incomplete" description="The system of laws and regulations is practically inexistent." isCommentRequired="true">true</tns:c4>
</tns:choices>
<tns:comment title="Comment"></tns:comment>
</tns:q1>
Schema -
<?xml version="1.0" encoding="utf-8"?>
<xs:schema targetNamespace="http://tempuri.org/XMLSchema2.xsd"
xmlns:tns="http://tempuri.org/XMLSchema2.xsd"
elementFormDefault="qualified" attributeFormDefault="unqualified"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
<xs:element name="q1">
<xs:complexType>
<xs:sequence>
<xs:element name="choices" maxOccurs="1" minOccurs="1">
<xs:complexType>
<xs:sequence>
<xs:element name="c1" maxOccurs="1" minOccurs="1">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:boolean">
<xs:attribute name="id" type="xs:string" fixed="s1.q1.c1"/>
<xs:attribute name="text" type="xs:string" fixed="Complete and exhaustive"/>
<xs:attribute name="description" type="xs:string" fixed="No action is needed."/>
<xs:attribute name="isCommentRequired" type="xs:boolean" fixed="false"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="c2" maxOccurs="1" minOccurs="1">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:boolean">
<xs:attribute name="id" type="xs:string" fixed="s1.q1.c2"/>
<xs:attribute name="text" type="xs:string" fixed="Overall satisfactory"/>
<xs:attribute name="description" type="xs:string" fixed="There is a sufficient system of laws and regulations; however, there are few aspects which are not covered (for instance on exempted material, small quantities, extent of authority, etc.)."/>
<xs:attribute name="isCommentRequired" type="xs:boolean" fixed="false"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="c3" maxOccurs="1" minOccurs="1">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:boolean">
<xs:attribute name="id" type="xs:string" fixed="s1.q1.c3"/>
<xs:attribute name="text" type="xs:string" fixed="Insufficient"/>
<xs:attribute name="description" type="xs:string" fixed="The system of laws and regulations is not sufficient to support effective SG implementation."/>
<xs:attribute name="isCommentRequired" type="xs:boolean" fixed="true"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="c4" maxOccurs="1" minOccurs="1">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:boolean">
<xs:attribute name="id" type="xs:string" fixed="s1.q1.c4"/>
<xs:attribute name="text" type="xs:string" fixed="Not existent or largely incomplete"/>
<xs:attribute name="description" type="xs:string" fixed="The system of laws and regulations is practically inexistent."/>
<xs:attribute name="isCommentRequired" type="xs:boolean" fixed="true"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="comment" minOccurs="1" maxOccurs="1">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="title" type="xs:string" fixed="Comment"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="id" type="xs:string" fixed="s1.q1"/>
<xs:attribute name="text" type="xs:string" fixed="How would you rate the system of nuclear laws and regulations in force in the State with respect to safeguards implementation?"/>
<xs:attribute name="description" type="xs:string" fixed=""/>
<xs:attribute name="isAnsewerRequired" type="xs:boolean" fixed="true"/>
<xs:attribute name="condition" type="xs:string" fixed="/tns:choices"/>
</xs:complexType>
</xs:element>
</xs:schema>
The C# code (net6) -
using System;
using System.Xml;
using System.Xml.Schema;
namespace Validation
{
internal class Program
{
static void Main()
{
try
{
string xmlFilePath = "s1.xml";
XmlReaderSettings settings = new XmlReaderSettings();
settings.Schemas.Add("http://tempuri.org/XMLSchema2.xsd", "s1.xsd");
settings.ValidationType = ValidationType.Schema;
ValidationEventHandler eventHandler = new ValidationEventHandler(ValidationEventHandler);
// Create an XmlReader for the XML file
using (XmlReader reader = XmlReader.Create(xmlFilePath, settings))
{
XmlDocument document = new XmlDocument();
document.Load(reader);
var nsmgr = new XmlNamespaceManager(document.NameTable);
nsmgr.AddNamespace("tns", "http://tempuri.org/XMLSchema2.xsd");
document.Validate(eventHandler);
var nav = document.CreateNavigator();
var list = nav.Select("//*[@condition]", nsmgr);
while (list.MoveNext())
{
var item = list.Current;
//debugger shows that item is tns:q1 element
var condition = item.GetAttribute("condition", "");
//the condition read from tns:q1 node is "/tns:choices"
var result = item.Evaluate(condition, nsmgr);
//result shows 0 elements and I am expecting 1.
//If the condition is "//tns:choices" results contains 1 element.
if (result == null)
{
Console.WriteLine($"Validation error:Validation error");
}
}
}
Console.WriteLine("XML validation successful.");
Console.ReadLine();
}
catch (Exception ex)
{
Console.WriteLine("Error: " + ex.Message);
}
}
private static void ValidationEventHandler(object sender, ValidationEventArgs args)
{
if (args.Severity == XmlSeverityType.Warning)
Console.WriteLine("Warning: " + args.Message);
else
Console.WriteLine("Error: " + args.Message);
}
}
}
As in c# code comments, item.Evaluate with "/tns:choices" does not return any element, but only with "//tns:choices" that it returns choices element. However with same xml, and "/tns:choices" XPather.com return correctly.
What am I doing wrong?
Since its not allowing me to post it because there is more code than text; here I am trying to implement xs:assert like functionality. Since MS backed xml implementation supports only xsd1.0, and I do not want to use any third party implementation list SAXON, I have come up with this implementation.
You could change your XPath to have a relative path (default axis is the child axis):
condition="tns:choices"
When you have the leading slash: /tns:choices, then the XPath will "jump up" to the root node at the top of the tree and then look for tns:choices - but the document element is tns:q1, not tns:choices.
You could also use the XPath: /tns:q1/tns:choices, or /*/tns:choices.