Implement something

k@k-desktop:~/Desktop$ pellet help modularity
PelletModularity: Extract ontology modules for classes

Usage: pellet modularity -s arg [options] <file URI>...

Argument description:

--signature, -s (Space separated list)
    One or more entity URI(s) or local name(s) to be extracted as a module.
    Example: "Animal Wildlife Rainforest"

--type, -t (lower| upper | upper-of-lower | lower-of-upper)
    The type of the module that will be extracted. See
    http://bit.ly/ontology-module-types for an explanation of the module
    types. (Default: lower)

--help, -h
    Print this message

The paper at http://bit.ly/ontology-module-types goes into great
detail about the approach, semantics, algorithm, etc.

Cheers,
Kendall