Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Einstein is an open source fourth generation programming language (4GL) written on top of the Deesel 3GL programming language.All data in Einstein takes the form of a message. A message contains a payload and associated metadata which relates to such concerns as routing, security and so on. The payload takes the form of a DataObject, DataObject's are a means to interact with payloads without knowing the nature of the data in the payload. So one may query, join, split, etc a payload without knowing whether it is XML or an object graph. This abstraction is essential to allow the instructions and operators of the language to perform the same operations no matter what data it is dealing with. Once you have written a splitting router for example (by combining the split and route instructions) it will do that operation to any data it receives, improving re-use.

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