BioDSL (pronounced Biodiesel) is a Domain Specific Language for creating bioinformatic analysis workflows. A workflow may consist of several pipelines and each pipeline consists of a series of steps such as reading in data from a file, processing the data in some way, and writing data to a new file.

BioDSL is build on the same principles as Biopieces, where data records are passed through multiple commands each with a specific task. The idea is that a command will process the data record if this contains the relevant attributes that the command can process. E.g. if a data record contains a sequence, then the command reverse_seq will reverse that sequence.