class AbstractStandardTargetSelectionTagProcessor extends AbstractAttributeTagProcessor {


    protected AbstractStandardTargetSelectionTagProcessor(
            final TemplateMode templateMode, final String dialectPrefix, final String attrName, final int precedence) {
        super(templateMode, dialectPrefix, null, false, attrName, true, precedence, true);
    }



    @Override
    protected final void doProcess(
            final ITemplateContext context,
            final IProcessableElementTag tag,
            final AttributeName attributeName, final String attributeValue,
            final IElementTagStructureHandler structureHandler) {

        final IStandardExpressionParser expressionParser = StandardExpressions.getExpressionParser(context.getConfiguration());

        final IStandardExpression expression =
                expressionParser.parseExpression(context, attributeValue);

        validateSelectionValue(context, tag, attributeName, attributeValue, expression);

        final Object newSelectionTarget = expression.execute(context);

        final Map<String,Object> additionalLocalVariables =
                computeAdditionalLocalVariables(context, tag, attributeName, attributeValue, expression);
        if (additionalLocalVariables != null && additionalLocalVariables.size() > 0) {
            for (final Map.Entry<String,Object> variableEntry : additionalLocalVariables.entrySet()) {
                structureHandler.setLocalVariable(variableEntry.getKey(), variableEntry.getValue());
            }
        }

        structureHandler.setSelectionTarget(newSelectionTarget);

    }





    protected void validateSelectionValue(
            final ITemplateContext context,
            final IProcessableElementTag tag,
            final AttributeName attributeName, final String attributeValue,
            final IStandardExpression expression) {<FILL_FUNCTION_BODY>}


    protected Map<String,Object> computeAdditionalLocalVariables(
            final ITemplateContext context,
            final IProcessableElementTag tag,
            final AttributeName attributeName, final String attributeValue,
            final IStandardExpression expression) {
        // This method is meant to be overriden. By default, no local variables
        // will be set.
        return null;
    }


}

        // Meant for being overridden. Nothing to be done in default implementation.
    
<methods><variables>private final non-sealed boolean removeAttribute