Minor improvements to collapse.md documentation
@@ -9,7 +9,7 @@ robot collapse \
--output minimized_module.owl
```
-Any intermediate class (has one or more subclasses) that has *less* than the threshold number of subclasses will be removed. Top-level classes (do not have a named superclass) and bottom-level classes (do not have any subclasses) will not be removed.
+Collapse will not remove root classes or leaf classes (i.e. top-level classes, without a named superclass, and bottom-level classes, without any subclasses). For each intermediate class, if it has *fewer* subclasses than the threshold, then it will be removed.
For example, given `--threshold 2`:
@@ -63,4 +63,4 @@ For example, given `--threshold 2` and `--precious class:D`, that same example f
### Threshold Error
- The `--threshold` input must be an integer.
\ No newline at end of file
+ The `--threshold` input must be an integer greater than 1.
