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Steps to Reproduce:
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1. Create a JSF composite component in a JSF project:
2. Add the following attribute

<cc:attribute name="label" type="java.lang.String" required="#!cc.attrs.noLabel}"/>

3. There is an incorrect validation error: "Value should be one of true, false"
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1. Create a JSF composite component in a JSF project: 2. Add the following attribute <cc:attribute name= "label" type= "java.lang. String " required= "#!cc.attrs.noLabel}" /> 3. There is an incorrect validation error: "Value should be one of true, false"
Forum Reference:
https://community.jboss.org/message/843829#843829
Git Pull Request:
https://github.com/jbosstools/jbosstools-javaee/pull/166

First at all we must have a preference page where we can disable this validation.
There should not be any validation which is imposible to disable.
Every validation problem should have a default quick fix which opens the corresponding preference page and disable this validation rule.
We have such preferences/quick fixes for our validation that extends common validation framework.
But this one is a part of XModel validation (https://github.com/jbosstools/jbosstools-base/blob/master/common/plugins/org.jboss.tools.common.model/src/org/jboss/tools/common/model/markers/ConstraintChecker.java).

is cloned by

JBIDE-15829 CLONE - Incorrect Constraint Problem for JSF composite component

is incorporated by

JBIDE-8445 Do not create markers at internal attribute validation by XModel

relates to

JBIDE-8445 Do not create markers at internal attribute validation by XModel