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Ubiquitous Language is the term Eric Evans uses in Domain Driven
Design for the practice of building up a common, rigorous language
between developers and users. This language should be based on the
Domain Model used in the software - hence the need for it to be
rigorous, since software doesn't cope well with ambiguity. Evans makes clear that using the ubiquitous language between in
conversations with domain experts is an important part of testing it,
and hence the domain model. He also stresses that the language (and
model) should evolve as the team's understanding of the domain grows.
By using the model-based language pervasively and not being
satisfied until it flows, we approach a model that is complete and
comprehensible, made up of simple elements that combine to
express complex ideas.
...
Domain experts should object to terms or structures that are
awkward or inadequate to convey domain understanding; developers
should watch for ambiguity or inconsistency that will trip up
design.
--Eric Evans
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