how to process the groupings or typedefs in schema comparison

[lllyfeng]

we can presume a grouping or a typedef is defined in one module, and this defintion is referenced by another module, if this definition has a nbc change, should all statements which reference this defiintion be nbc change?

For example:
module a {
revision-label "1.0.0";
typedef type1 {
type uint32 {
range 1..100;
}
}
}

And
module b {
import a;

container b {
leaf c {
type a:type1;
}
}
}

if module a change the type1's range to 1..50, the leaf c in module b should also have the nbc change?
if yes, the module b have no any text change, how to express this change?
if no, the scope of leaf c is reduced actually.

[jsterne]

Since module B did not have any changes, module B itself would not have any indications of an NBC change (there would not be a new version of module B created with a rev:non-backwards-compatible extension).

But if both module a and module b are part of a set of modules being compared (against other revisions of a and b) with a schema comparison tool, then the tool should point out the NBC change. IMO the tool should report:

1. the NBC change against each leaf that uses the typedef, and
2. the NBC change against the typedef itself