"Not a parent" confusion

[runsun]

Hi, after extensive reading, I am getting to understand most of the settings in lexer configuration, but still can't get a hold of what "Not a parent" means. I've collected several explanations from all the possible sources I can find:

*** Not a parent - flag that specifies that "parent block" is not a parent of the rule.
*** Not parent - specifies that the blocks do not yavlyaetya parent rule. those. it can a parent but not the rule

But, the purpose of "parent block" is to set the parent block of this rule. How can the parent block that is set to be a parent of this rule be, at the same time, "not a parent of the rule" ?

Can someone offer actual example usage ?

[Alexey]

What do options mean: "Parent block", "Strict parent", "Not a parent"?

Example. Current rule is A, it's "parent block" set to P.

1) If "Parent block" cleared, no checking of parents done.
2) If "Not a parent" set, then parent of A can be any rule *except* rule P.
3) If "Strict parent" set, then parent of A must be P, and P must be *nearest* parent, not parent of parent (of parent...) of A.
4) Not sure what means "strict parent" and "not a parent" both set.

[Alexey]

I welcome done lexer as Zip file (make it by ExLexer plugin!!)

[runsun]

4) Not sure what means "strict parent" and "not a parent" both set.

Usually, mutually conflicting options always use radio box, but not check box. Using check box (that allows users to check both) means checking both has some meaning.