Important label notes:
• types - a container for data type (label) definitions, which use schema to define some label structures for message reference
• message - an abstract typed definition of the data structure of the communication message. Labels defined in reference types
• operation - an abstract description of the operations supported in the service, an operation describes a request message and response message pair for an access entry.
• portType - an abstract set of operations supported by an access entry point type that can be supported by one or more service access points.
•binding - a binding for a specific protocol and data format specification for a specific port type.
• service - a collection of related service access points
• port - a single service access point defined as a combination of protocol/data format bindings and specific web access addresses.