ElementGroup

SysMLv1 (or v2): CHALLENGE EXERCISE: Simplified Parsing Analysis breakdown of 'Build an Airport' with variations

Webel Parsing Analysis: MagicDraw/Cameo: SysML1.6+: ElementGroup-based Snippets do not list in the compartment of Package/Model symbols because ElementGroup is based on the UML Comment, which does not list in Package/Model symbols.

PAD for eliciting the letters of an English-language pangram

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Tutorial

TRAIL: Theory and best practices for the Webel Parsing Analysis recipe for SysMLv1.6+

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Slide kind

SysML Block Definition Diagram (BDD)

Webel Parsing Analysis: While Associations may be collected as elicited members of a Snippet this can quickly lead to clutter in the /member list display. Often just collecting an end Property as member is sufficient.

Webel Parsing Analysis: While Generalizations may be collected as elicited members of a Snippet this can quickly lead to clutter in the /member list display.

Webel Parsing Analysis: An anonymous Element may be collected as a /member of a Snippet (it is not important whether collected elements list with a clear name under /member, only that they are traceably elicited).

Webel Parsing Analysis: A Parsing Analysis Container MAY own other child Parsing Analysis Containers

Webel Parsing Analysis: The absolute basics of the process (SysMLv1.x form)

Webel Parsing Analysis: The symbol for the relationship between a Parsing Analysis Container and elicited model elements SHOULD be a dashed line (like the anchor/handle line used with a UML Comment)

Webel Parsing Analysis: A Parsing Analysis Container MUST NOT be able to own the Elements it elicits

SysMLv1.x: Q: Why can't a Package with PackageImports be used as a Parsing Analysis text container? Why is the SysML1.6 ElementGroup (extended and customised as the Webel «snippet») far better suited for text-driven model element elicitation?

Screencast: Webel SysML Parsing Analysis demo - Behavior - Mars Society University Rover Challenge 2020

Keywords

Webel Parsing Analysis

Video style

© Copyright 2020 Darren R C Kelly (Webel IT Australia). All rights reserved.

The Webel Parsing Analysis recipe for SysML was applied to some of the rules text from the Mars Society University Rover Challenge.

This informal narrated screencast records some Activity and StateMachine simulations in Cameo Simulation Toolkit.

Read more about Screencast: Webel SysML Parsing Analysis demo - Behavior - Mars Society University Rover Challenge 2020

Webel: SysMLv2: WISHLIST: Ability to relate one ElementGroup to another

Webel Parsing Analysis for SysML - simplified profile

Webel Parsing Analysis: Relationships between «snippet» items can be tracked using additional tagged values such as 'contradictedBy' and 'contradicts'. This is robust, but it can be verbose when Snippets have long names if the tagged values are displayed.

One limit of the SysML-1.6 ElementGroup for use as a Snippet in the v1.x version of Webel Parsing Analysis for SysML is that an ElementGroup is not directly relatable.

Even relatively informal elicitation of model elements using the SysML ElementGroup and a Parsing Analysis approach is extremely powerful.

MagicDraw/Cameo: The apparent grouping of member elements under an ElementGroup node in the model tree can cause complications for searching and for the Cameo Collaborator exports.

SysMLv1.x: An ElementGroup in the model tree browser of MagicDraw/Cameo

Gallery

Tutorial

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Section

18:01: Logical grouping with the ElementGroup extension of Comment in SysMLv1.x

Slide kind

MagicDraw/Cameo: table

SysML Block Definition Diagram (BDD)

SysMLv1.x: Customizing the ElementGroup extensions for the Webel Parsing Analysis recipe (simplified)

This content has been marked as discussing an ADVANCED topic!

Gallery

Tutorial

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Section

18:01: Logical grouping with the ElementGroup extension of Comment in SysMLv1.x

Slide kind

UML Profile Diagram

Webel Parsing Analysis: typically the quoted extract text (body) of a «snippet» is a short phrase, a sentence, or a couple of short sentences (but not dozens of sentences).

SysMLv1.x: Extending the ElementGroup for the Webel Parsing Analysis recipe (a quick look)

This content has been marked as discussing an ADVANCED topic!

Gallery

Tutorial

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Section

18:01: Logical grouping with the ElementGroup extension of Comment in SysMLv1.x

Slide kind

UML Profile Diagram

SysMLv1.x: An ElementGroup used for basic Parsing Analysis model element elicitation: Example 2

Gallery

Tutorial

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Section

18:01: Logical grouping with the ElementGroup extension of Comment in SysMLv1.x

Slide kind

MagicDraw/Cameo: table

SysML Block Definition Diagram (BDD)

An ElementGroup comment symbol may appear on more than one diagram type and may collect different kinds of anchored annotatedElement members from more than diagram.

The grouping of member elements by an ElementGroup is denoted here "logical" in the sense that it does not "steal ownership" of member elements (as opposed to "physical" ownership of elements in the model)

The Webel Parsing Analysis recipe for SysML1.x does not use the ElementGroup directly, it extends it as a user-defined Snippet stereotype with keyword «snippet» and with MagicDraw Customization.

SysMLv1.x: An ElementGroup used for basic Parsing Analysis model element elicitation: Example 1

Gallery

Tutorial

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Section

18:01: Logical grouping with the ElementGroup extension of Comment in SysMLv1.x

Slide kind

SysML Block Definition Diagram (BDD)

The default display of all tagged values on the comment symbol for an ElementGroup can make diagrams cluttered, but you can extend it with a custom stereotype and customise the default visible tagged values.

Do not feel obliged to use the 'name' property of an ElementGroup if you don't feel it adds value.

SysMLv1.x: The ElementGroup stereotype

Gallery

Tutorial

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Section

18:01: Logical grouping with the ElementGroup extension of Comment in SysMLv1.x

Slide kind

UML Profile Diagram

ElementGroup::/size : Integer [1] Number of members in the group. Derived. (derived)

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OMG Systems Modeling Language (SysML) 1.6

ElementGroup::orderedMember : Element [0..*] Organize member according to an arbitrary order. Optional. (subsets: ElementGroup::member)

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OMG Systems Modeling Language (SysML) 1.6

ElementGroup::name : String [1] Name of the element group

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OMG Systems Modeling Language (SysML) 1.6

ElementGroup::/member : Element [0..*] Set specifying the members of the group. Derived from Comment::annotatedElement. (derived)

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OMG Systems Modeling Language (SysML) 1.6

ElementGroup::/criterion : String [0..1] Specifies the rationale for being member of the group. Adding an element to the group asserts that the criterion applies to this element. Derived from Comment::body. (derived)

Source

OMG Systems Modeling Language (SysML) 1.6

Element groups can be members of other element groups, but this does not imply that members of the first are members of the second.

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OMG Systems Modeling Language (SysML) 1.6

The elements in a group are identified by the modeler, as opposed to being the result of a query, as in views.

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OMG Systems Modeling Language (SysML) 1.6

Element groups do not own their elements and thus an element can participate in an unlimited number of groups.

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OMG Systems Modeling Language (SysML) 1.6

Grouped elements are the annotated elements of the comment to which the stereotype is applied. This has several implications:

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OMG Systems Modeling Language (SysML) 1.6

ElementGroups appear in diagrams as comments, and properties of the stereotype appear in the notation for stereotype properties.

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OMG Systems Modeling Language (SysML) 1.6

Optionally, members of an element group can be ordered using its orderedMember property.

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OMG Systems Modeling Language (SysML) 1.6

The criterion for membership in an element group is specified by the body of the comment the stereotype is applied to. By grouping elements, the modeler asserts that the criterion of the group applies to the member.

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OMG Systems Modeling Language (SysML) 1.6

Element groups are named using the name property.

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OMG Systems Modeling Language (SysML) 1.6

The semantics of ElementGroup is modeler-defined. In particular, the body text is not restricted. It can describe the grouped elements as well as elements or values related to the grouped elements.

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OMG Systems Modeling Language (SysML) 1.6

For example, it can group elements that are associated with a particular release of the model, have a certain risk level, or are associated with a legacy design.

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OMG Systems Modeling Language (SysML) 1.6

The ElementGroup stereotype provides a lightweight mechanism for grouping various and possibly heterogeneous model elements by extending the capability of comments to refer to multiple annotated elements.

Source

OMG Systems Modeling Language (SysML) 1.6

18:01: Logical grouping with the ElementGroup extension of Comment in SysMLv1.x

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Slides in this section

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SysMLv1.x: The ElementGroup stereotype

SysMLv1.x: An ElementGroup used for basic Parsing Analysis model element elicitation: Example 1

SysMLv1.x: An ElementGroup used for basic Parsing Analysis model element elicitation: Example 2

SysMLv1.x: An ElementGroup in the model tree browser of MagicDraw/Cameo

SysMLv1.x: Extending the ElementGroup for the Webel Parsing Analysis recipe (a quick look)

SysMLv1.x: Customizing the ElementGroup extensions for the Webel Parsing Analysis recipe (simplified)

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