| CAUSE | Validity Constraint 3.2.1 failed: Parameter-entity replacement text must be properly nested with parenthesized groups. For interoperability, if a parameter-entity reference appears in a choice, seq, or Mixed construct, its replacement text should not be empty, and neither the first nor last non-blank character of the replacement text should be a connector (| or ,). *Example: ]> Hello! *Explanation: The parenthetical content of the e entity may not be split up into sections: both open and close parentheses must be in the same declaration. |