Uses of Interface
org.xml.sax.Locator

Packages that use Locator 
Package Description
org.xml.sax
Provides the interfaces for the Simple API for XML (SAX).
org.xml.sax.ext
Provides interfaces to SAX2 facilities that conformant SAX drivers won't necessarily support.
org.xml.sax.helpers
Provides helper classes, including support for bootstrapping SAX-based applications.