An annual conference focused on the technologies and methods used for declarative programming and declarative data. Declarative programming is a style of programming that expresses the logic of computation without describing its control flow. It allows you to focus on the ‘what’ of a program, rather than the ‘how’. Declarative programs can be constructed in a fraction of the time, using much less code than a traditional computer program. Declarative methods for programming and data modelling can help avoid making the mistakes that have lead to failing software projects for several decades.