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Having problems validating XML depending on the XML parser used ..... how can I imagine the restriction for universal adoption

I have a strange situation that puzzled me a bit ....

I have an XML data file that I am trying to validate on a schema that seems to give different results depending on the parsers used. Not sure what I'm doing wrong, or how best to represent constraints in a schema so that all parsers can validate XML correctly. Here is a fragment of the problem part of the circuit:

<xsd:element name="DemoValues">
<xsd:annotation>
  <xsd:documentation>Demo values for any, or all, of the demo categories defined on the GAP . A
    demo value includes a reference to the category it applies to, a value in the appropriate
    format and an optional market reference if it is for a specific market. If the market
    reference is omitted the demo value applies to the entire area serviced by the outlet. Each
    demo category may only have a single demo value within this group of demo values. However if
    the demo value is for a market, there may be a demo value per market within this group of
    demo values. </xsd:documentation>
</xsd:annotation>
<xsd:complexType>
  <xsd:sequence>
    <xsd:element name="DemoValue" type="gap:demoValueType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>
<xsd:unique name="DemoValueConstraint">
  <xsd:annotation>
    <xsd:documentation>Constraint allows only up to one demo value for a demo category, and per
      market when a market reference exists. </xsd:documentation>
  </xsd:annotation>
  <xsd:selector xpath="gap:DemoValue"/>
  <xsd:field xpath="@demoRef"/>
  <xsd:field xpath="@marketRef|@demoRef"/>
</xsd:unique>

Here is the offensive XML:

<DemoValues>
          <DemoValue demoRef="DM0" marketRef="MKT1">0.40</DemoValue>
          <DemoValue demoRef="DM1">15.00</DemoValue>
</DemoValues>

Produces this error:

Element '{http://www.AAAA.org/schemas/canadianTVGAP}DemoValue', 'marketRef': XPath @marketRef | @demoRef ' ' {http://www.AAAA.org/schemas/canadianTVGAP}DemoValueConstraint ' node -set .

: "marketRef" .

xml - :

1)

 <DemoValues>
          <DemoValue demoRef="DM0" marketRef="MKT1">0.40</DemoValue>
          <DemoValue demoRef="DM1">15.00</DemoValue>
 </DemoValues>

2)

<DemoValues>
          <DemoValue demoRef="DM0" marketRef="MKT1">0.40</DemoValue>
          <DemoValue demoRef="DM0" marketRef="MKT2">0.41</DemoValue>
          <DemoValue demoRef="DM0" marketRef="MKT3">0.42</DemoValue>
          <DemoValue demoRef="DM0" marketRef="MKT4">0.43</DemoValue>
          <DemoValue demoRef="DM1">15.00</DemoValue>
</DemoValues>

3)

<DemoValues>
          <DemoValue demoRef="DM0" marketRef="MKT1">0.40</DemoValue>
          <DemoValue demoRef="DM1" marketRef="MKT1">0.41</DemoValue>
          <DemoValue demoRef="DM2" marketRef="MKT1">0.42</DemoValue>
          <DemoValue demoRef="DM3">15.00</DemoValue>
</DemoValues>

!

+3
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+1

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+1

Source: https://habr.com/ru/post/1784546/

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