AVT and 'valid'

https://www.w3.org/community/xformsusers/wiki/XForms_2.0#Attribute_Value_Templates

"If there are unmatched unescaped braces in an attribute value template,  
or the enclosed expression is not valid or contains other static errors,  
an [[#The xforms-expression-error Event|xforms-expression-error]] event is  
dispatched to the element containing the expression."

I'm assuming that this is a different use of the word 'valid' than  
elsewhere, so I am changing it to "syntactically correct".

Correct me if I am wrong.

Steven