Search the entire subtree rooted at the named object.
If the named object is not a DirContext, search only the object. If the named object is a DirContext, search the subtree rooted at the named object, including the named object itself.
The search will not cross naming system boundaries.
The NamingEnumeration that results from search() using SUBTREE_SCOPE contains elements of objects from the subtree (including the named context) that satisfy the search filter specified in search(). The names of elements in the NamingEnumeration are either relative to the named context or is a URL string. If the named context satisfies the search filter, it is included in the enumeration with the empty string as its name.
The value of this constant is 2
.