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Glossaries Glossary - Tag to Traverse

Contains two glossaries of commonly-used terms. Select each letter for that part of the glossary.

Systems Engineering Glossary

Contains a list of the terminology used in requirements management, systems engineering and V&V (validation and verification), including terms used in model-based systems engineering (MBSE). The definitions of some of these terms are often the subject of debate. These are our definitions. If you disagree with any of them, please contact us to discuss! This list is not exhaustive.

A B C D E F G H I N O P Q R S T U V W

Cradle Glossary

Contains a list of the principal terminology used in Cradle. This list is not exhaustive.

A B C D E F G H I K L M N O P Q R S T U V W Y

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Tag

Tags are Microsoft Word bookmarks with assigned names which we use alongside Document Publisher.

Tag - SysML

An attribute of a SysML element often displayed alongside the symbol.

Task

A task is an activity that has been allocated to one or more Cradle users.

Task List

A task list is a collection of activities associated with one or more plans that have been assigned to a specific user.

Team

A team is a group of users. Information can be owned by a team as well as by the users in a team.

Team Hierarchy

Information owned by a team can optionally be made accessible to the members of its sub-teams and optionally by members of its super-teams. Thus a team hierarchy permits a hierarchical control of access to information. The top of the hierarchy is the reserved team PROJECT. All information owned by PROJECT is held in baselines.

Terminator

An element of the real-world with which a system is to interact. An active entity which produces stimuli to which the system must respond and/or collects responses from the system to its own stimuli or those of other terminators.

Terminator Description

A type of textual specification which is created in both the analysis and system design phases as part of the Essential and Implementation Domains. Terminator Descriptions describe the characteristics of terminators: the elements of the real-world with which the system is to interact.

Text String

A sequence of 7-bit ASCII characters within un-escaped single quote characters. Within text strings, any printable 7-bit ASCII character is permitted, and a variety of escape sequences are supported to allow the representation of characters outside the 7-bit printable ASCII character set (ASCII 32 through 126 inclusive).

Theme

Themes are used in Web Publisher to show a different background appearance to your website.

Thread

Threads represent paths through a state model, starting at an environment terminator, and following flows and links through the Data Flow Diagrams (DFDs) and Physical Architecture Diagrams (PADs) to another environment terminator. Their purpose is to aid interpretation of the data calculated by performance modelling, which can be quite large. Threads are not used during the actual performance modelling process as at that stage all parts of the state model are calculated. They are used during reporting to selectively report just those results that are for symbols along the thread’s path.

Tied Move

A variant of the symbol move operation in Cradle diagrams. In a normal move operation, the distance moved by the routepoints of all connector symbols is the average of the distances moved by the objects at either end of the connector. In a tied move operation, the distance moved by the routepoints of each connector is the same as the distance moved by the source or destination object, whichever has been moved by the user.

Timeline

Some diagram types are time-sequenced, in which functions or operations are distributed along a timeline. The timeline can be branched and sub-branched using parallel, option and iteration constructs that are indicated by nodes (small circles) labelled AND, OR, I and R.

To Part

One of the references that, together with the from part, constitute a cross reference. It defines one of the items that the cross references makes dependent on another item. It is often termed the destination of the cross reference.

Token

A token-based licensing mechanism is available where you buy a pool of tokens and the CDS allocates a licence by using a number of tokens for the type of licence being requested.

Tooltip

A type of context-sensitive on-line help within a UI. When the user moves the cursor onto a UI control, and leaves the cursor stationary for a short period (typically one second) without pressing any mouse buttons, then a small window is displayed attached to the button that contains an explanation of the function of the button, normally as a single sentence.

Traceability

The ability to cross reference items of information created at several stages in a systems development process such that it is possible to relate items in earlier stages of the process to items in the later stages of the process, and vice versa.

Transition

A symbol on a State Transition Diagram (STD) that interconnects states. Transitions are the means by which the finite-state-machine represented by the STD makes transitions between states. Each transition has an associated condition, that is the prerequisite for the transition occurring, and a set of zero or more associated actions that are the means by which the STD effects control of associated functions.

Transitive Cross Reference

A cross reference that results from the combination of two or more other cross references to create a link between two items of information that did not need to be perceived or foreseen or indeed be actually created by project engineers. Transitive cross references result from manually and automatically created direct cross references between items of information created in successive phases of the project lifecycle. Transitive cross references exploit these direct cross references to highlight inter-relationships that might have otherwise not been appreciated. As such, engineers navigating through a project database based on cross references will, by using transitive cross references, discover relationships of which they were hitherto unaware.

Traverse

Traversing selected symbols produces a list of diagrams containing the selected object or its parent(s).