api/src/main/java/javax/jdo/query/package.html

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    <title>Query package</title>
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    Package providing expressions for building a typed JDOQL query.
    Fields/Params/Vars of a persistable type are represented as <em>Expression</em>.
    All generated "Q" classes extend "PersistableExpression", and provide the fields/properties 
    of the persistable class as Expression types.
    Fields/Params/Vars of a container type are represented as <em>CollectionExpression</em>, <em>MapExpression</em>.
    Fields/Params/Vars of other types, or literals are represented by
    <ul>
        <li>StringExpression</li>
        <li>EnumExpression</li>
        <li>NumericExpression</li>
        <li>BooleanExpression</li>
        <li>ByteExpression</li>
        <li>CharacterExpression</li>
        <li>DateExpression</li>
        <li>DateTimeExpression</li>
        <li>TimeExpression</li>
        <li>ObjectExpression</li>
    </ul>
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