about highlight just some part of file

Hello,

 

       I have a requirement about self-defined syntax strategy.  For the TEXT file,

I have always highlighted the essential info that can be matched by the pattern

Defined within syntax file.  That is to say, all the mathed info throughout the file

Shall be highlight. But that is now what I need. I want to know how to set a zone

In file that syntax-highlight can be disabled.