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This
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section
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describes
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in
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more
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detail
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the
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links
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between
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use
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cases
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and
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the
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community
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concept
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introduced
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in
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,
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by
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means
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of
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the
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21090
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example.
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Recall
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that
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each
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use
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case
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represents
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a
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fragment
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of
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behaviour
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of
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a
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system,
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defined
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by
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the
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specific
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triggering
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action
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of
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the
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primary
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actor
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that
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initiates
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interactions
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in
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order
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to
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achieve
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its
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own
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goal.
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A
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complete
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behaviour
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of
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the
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system
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with
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respect
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to
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a
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specific
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primary
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actor
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can
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be
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derived
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by
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combining
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all
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use
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cases
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involving
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the
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same
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actor.
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Further,
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an
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overall
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behaviour
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of
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the
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system
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itself
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can
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be
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described
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by
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considering
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all
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primary
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actors
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that
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interact
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with
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the
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system.
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The
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community
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concept
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can
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be
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used
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to
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describe
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collaborative
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structures
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involving
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all
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actors
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in
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the
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interaction
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with
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the
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system
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(and
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possibly
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among
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themselves).
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This
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enables
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grouping
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of
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the
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related
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actors
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and
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use
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cases
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identified
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in
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the
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use
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case
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analysis
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into
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a
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collaborative
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structure
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that
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clearly
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defines
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boundary
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of
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a
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specific
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business
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domain,
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whether
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clinical
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or
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administrative
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in
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nature.
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Recall
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that
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the
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community
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concept
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essentially
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provides
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a
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formal
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way
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of
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representing
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collaboration
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structure
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reflecting
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organizational
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concepts
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such
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as
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roles,
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processes/interactions
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(traced
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back
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to
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use
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cases),
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business
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services
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and
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policies.
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The
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community
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concept
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also
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allows
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for
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the
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description
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of
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hierarchical
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and
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federated
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collaborative
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structures,
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truly
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reflecting
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various
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organisational
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and
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social
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structuring
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mechanisms,
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while
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supporting
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downstream
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software
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development
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processes.
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Figure
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4.4-1
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depicts
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a
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community
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model
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derived
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by
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combining
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use
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cases
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and
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actors
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from
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the
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21090
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datatype
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support
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use
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case
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discussed
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in
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section
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.
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The
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<<EV_Role>>
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stereotype
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denotes
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community
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role
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(i.e.,
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Enterprise
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Viewpoint
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role).
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The
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roles
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in
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orange
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represent
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community
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roles
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to
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be
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taken
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up
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by
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people
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with
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appropriate
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position
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in
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this
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community,
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referred
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to
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as
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21090
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support
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community.
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These
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roles
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are
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Information
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Modeler,
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Systems
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Architect,
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and
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Software
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Engineer.
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These
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are
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the
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roles
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that
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are
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identified
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taking
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into
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account
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actors
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in
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the
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use
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cases
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presented
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above.
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The
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EV_InteractionInitator
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stereotype
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indicates
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the
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fact
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that
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these
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roles
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are
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initiator
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of
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interactions.
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The
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roles
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in
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blue
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are
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roles
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to
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be
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fulfilled
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by
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system
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components,
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which
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will
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provide
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SI
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services.
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These
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roles
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are
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UML
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model
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tool,
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Information
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Model
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Repository,
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Data
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Type
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Repository,
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Browser,
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and
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ECCF
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Repository.
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The
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association
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between
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these
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system
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components
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and
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the
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interactions
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modelling
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elements
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are
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of
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the
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EV_InteractionResponder
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stereotype,
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but
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they
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are
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not
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shown
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in
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the
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figure
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to
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reduce
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clutter.
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The
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invocation
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of
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the
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SI
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services
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and
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the
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interactions
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between
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actors
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and
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systems
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are
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depicted
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using
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the
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<<EV_Interaction>>
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stereotype.
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The
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analysis
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of
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the
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related
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use
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cases
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considered
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in
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section
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...
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led
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to
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the
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identification
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of
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two
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sub-communities
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of
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the
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21090
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datatype
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support
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community,
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depicted
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in
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Figure
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4.4-1.
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One
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sub-community
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(upper
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part
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in
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the
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figure)
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has
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an
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objective
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of
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providing
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operational
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support
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to
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the
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Information
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Role,
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while
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other
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sub-community
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has
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an
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objective
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of
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ensuring
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tool
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interoperability
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via
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ECCF
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conformance
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rules.
Figure 4.4-1
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Combining
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Use
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Case
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Models
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in
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a
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Community
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Model
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