processing workflows orchestration language

Using and integrating geospatial web services compatible with OGC standards are inevitable in GIS applications. OGC web services composition is possible by various approaches. One of the most common approaches to compose geospatial web services is by using orchestration languages. WS-BPEL language known as an accepted language for web service composition is an efficient orchestration language for common web services in industry. But due to the lack of support for OGC standards such as GetCapabilities, it is not an efficient approach to compose OGC web services. In this paper, we present an orchestration language compatible with OGC standards to tackle this problem. The language