Remove Document Specific Declarations

Dear all,

I would like to know how and why the following lines appear from time to time in xml files:

<!-- Begin Document Specific Declarations -->
<?Fm Validation Off?>
<!-- End Document Specific Declarations -->

I couldn't reproduce the behavior. My colleagues and I all have FM15 and we use presumably the same configuration.

We are sharing the files:

• only 1 workstation generates theses annoying (from a scripting POV) declarations. But only from time to time.
• when files containing the declarations are processed on other workstations, the declarations are removed upon saving.

Where do I have to look to find the reason for the declarations generation? How do I suppress the declarations?

Regards

PS: a similar question: Suppress FM comments in Doctype declaration