APPEL - AGILA ProPErty and Dependency Description Language

We give an overview of the language APPEL, the “AGILA Property and Dependency Description Language”. It is part of the cloud-based tool AGILA that supports agile development methods. The language allows us to structure and document the knowledge about system-wide dependencies in a formal, textual form. APPEL models can be uploaded to the cloud, where they are used as a knowledge-base for continuous verification and validation, from early specification to run-time verification. We describe syntax, semantics, and demonstrate its application for predicting the performance of hardware/software systems in the context of the GENIAL! project.