Packages 
Package Description
org.apache.xml.security.algorithms
algorithm factories.
org.apache.xml.security.c14n
Canonicalization related material and algorithms.
org.apache.xml.security.encryption
Provides classes for implementing XML Encryption applications.
org.apache.xml.security.exceptions
general exceptions used by this library.
org.apache.xml.security.keys
general key related material.
org.apache.xml.security.keys.content
basic handlers for elements that can occur inside ds:KeyInfo.
org.apache.xml.security.keys.content.keyvalues
basic handlers for elements that can occur inside ds:KeyValue.
org.apache.xml.security.keys.content.x509
basic handlers for elements that can occur inside ds:X509Data.
org.apache.xml.security.keys.keyresolver
the resolver framework for retrieval of certificates and public keys from elements.
org.apache.xml.security.keys.storage
a resolver framework for certificates and public keys from user-specified locations.
org.apache.xml.security.signature
XML Signature specific classes.
org.apache.xml.security.transforms
the framework for XML Signature transforms.
org.apache.xml.security.transforms.params  
org.apache.xml.security.utils
general utility classes.
org.apache.xml.security.utils.resolver
the ResourceResolver classes used to resolve ds:Reference URIs.