The publish-find-bind pattern (OGC 2003) governs the interactions between actors within a spatial data infrastructure. It depicts a mechanism how supply of and demand for geographic information and geoprocessing resources can meet in a distributed GI service environment. This pattern usually consists of three roles (GI service provider, GI service registry, GI service requestor) and three operations performed by actors while playing a certain role (publish, find, bind). In figure 1 we enhance this pattern to accommodate a fourth operation, . version, performed by the GI service provider. The GI service provider establishes a product line of vertically.
