Rules

• Name: The value can be anything.

  The name of the item.

• Keywords: The value can be anything.

  A keyword is a lightweight variant of a stereotype to extend the semantics of a model element. As opposite of stereotypes, keywords does not have do be defined in a profile.

  If several keywords are given, they should be separated by commas.

• Stereotypes: The value can be anything.

  A stereotype defines how a model element may be extended, and enables the use of platform or domain specific terminology or notation in place of, or in addition to, the ones used for the extended metaclass.

  Stereotypes should be given in the format 'profile::stererotype'. Stereotypes should be separated by commas.

• Documentation: The value can be anything.

  A textual description of the element.

• Classifier: The value can be anything.

  The classifier or classifiers of the represented instance. If multiple classifiers are specified, the instance is classified by all of them.

• Visibility: The value shall be a valid literal from the enumeration Visibility Kind.

  Determines where the item appears within different Namespaces within the overall model, and its accessibility.

An element of one of the following kinds:

• Component (Component)

  A component represents a modular part of a system that encapsulates its contents and whose manifestation is replaceable within its environment.

  In the namespace of a component, all model elements that are involved in or related to its definition are either owned or imported explicitly. This may include, for example, use cases and dependencies (e.g. mappings), packages, components, and artifacts.

• Model (Model)

  A model captures a view of a physical system. It is an abstraction of the physical system, with a certain purpose.

  This purpose determines what is to be included in the model and what is irrelevant. Thus the model completely describes those aspects of the physical system that are relevant to the purpose of the model, at the appropriate level of detail.

• Package (Package)

  A package is used to group elements, and provides a namespace for the grouped elements.

  A package can have one or more profile applications to indicate which profiles have been applied.

• Profile (Profile)

  A profile defines limited extensions to a reference metamodel with the purpose of adapting the metamodel to a specific platform or domain.

• Template Parameter (Template Parameter)

  A template parameter exposes a parameterable element as a formal template parameter of a template.

Rules

• Arbitrary number of Slot (Slot)

  A slot specifies that an entity modeled by an instance specification has a value or values for a specific structural feature.

Rules

• Arbitrary number of elements of the following kinds:
  • Abstraction (Abstraction)

    An abstraction is a relationship that relates two elements or sets of elements that represent the same concept at different levels of abstraction or from different viewpoints.

  • Dependency (Dependency)

    A dependency is a relationship that signifies that a single or a set of model elements requires other model elements for their specification or implementation.

    This means that the complete semantics of the depending elements is either semantically or structurally dependent on the definition of the supplier element(s).

  • Information Flow (Information Flow)

    An information flow specifies that one or more information items circulates from its sources to its targets.

    Informationflows require some kind of information channel for transmitting information items from the source to the destination. An information channel is represented in various ways depending on the nature of its sources and targets. It may berepresented by connectors, links, associations, or even dependencies.

    For example, if the source and destination are partsin some composite structure such as a collaboration, then the information channel is likely to be represented by aconnector between them. Or, if the source and target are objects (which are a kind of instance specification), they may berepresented by a link that joins the two, and so on.

  • Realization (Realization)

    Realization is a specialized abstraction relationship between two sets of model elements, one representing a specification (the supplier) and the other represents an implementation of the latter (the client). Realization can be used to model stepwise refinement, optimizations, transformations, templates, model synthesis, framework composition, etc.

  • Substitution (Substitution)

    A substitution is a relationship between two classifiers signifies that the substituting classifier complies with the contract specified by the contract classifier. This implies that instances of the substituting classifier are runtime substitutable where instances of the contract classifier are expected.

  • Usage (Usage)

    A usage is a relationship in which one element requires another element (or set of elements) for its full implementation or operation. A usage is a dependency in which the client requires the presence of the supplier.

• Can be the Target of elements of the following kinds:
  • Abstraction (Abstraction)
  • Dependency (Dependency)
  • Deployment (Deployment)
  • Element Import (Element Import)
  • Information Flow (Information Flow)
  • Manifestation (Manifestation)
  • Realization (Realization)
  • Substitution (Substitution)
  • Usage (Usage)