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Asked: 2026-05-12T10:04:42+00:00

I am using xmllint –schema option to validate my XML that looks like this

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I am using xmllint –schema option to validate my XML that looks like this

<XML>
<Active>True</Active>
</XML>

In my schema file, I have following line that describes Active element.

<xsd:element name="Active" type="xs:boolean" />

When I run xmllint, I get error messages that says

/tmp/schema_validation.xml:73: element
Active: Schemas validity error :
Element ‘Active’: ‘True’ is not a
valid value of the atomic type
‘xs:boolean’.

When I change the XML to

<Active>true</Active>

Then the error message disappears.

So, it looks like xsd:boolean means it’s all lowercase “true/false” but not “True/False” to xmllint.. My question is, how can I make xmllint to accept “True” for xsd:boolean type? Or is there different tools that I can use that will validate this XML? Changing the XML or schema is not my option at this point.

Thanks!

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1 Answer

  1. Editorial Team

    You cannot.

    According to the XML Schema specification, a boolean is true or false. True is not valid:

    
  3.2.2.1 Lexical representation
  An instance of a datatype that is defined as ·boolean· can have the 
  following legal literals {true, false, 1, 0}. 

  3.2.2.2 Canonical representation
  The canonical representation for boolean is the set of 
  literals {true, false}.

    If the tool you are using truly validates against the XML Schema standard, then you cannot convince it to accept True for a boolean.

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