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102 N. Russell and A. ter Hofstede
language, which is described in detail in [6]. Initial versions of both the YAWL
language and system focussed on control-flow aspects. In light of new insights
into the full range of patterns that are relevant to a process, particularly in the
data and resource perspectives, a complete revision of the YAWL language, termed
newYAWL, has recently been proposed [219].

Object-Role Modeling

The standard reference on Object-Role Modeling (commonly referred to as ORM)
is [115].