Biztalk Schema Question:

Correlation types define a set of properties on which you will be correlating messages. These can be any properties which were previously defined in a property and deployed with some BizTalk Project including "system" properties deployed with the GlobalPropertySchemas Jump which is installed as part of the base BizTalk install. A correlation set defines a set of properties and values for these properties that a message must contain to be processed by a particular orchestration.