Extraction of Domain elements from Use cases

Sub-menu Validate->Extract Domain from Use Cases brings a Domain Model Extractor wizard that helps identify domain elements from use cases text elements.

Figure 3.5: Domain Model Extractor

The text element can be accepted as a non-entity bound condition or as an entity bound condition/use case operation.

To accept as non-entity bound condition, select the box labelled ``Accept as non-entity bound condition''.

Use section ``Select parts to match string'' to identify entities and operations. The section shows the condition, use case actor or the use case operation which needs to be analyzed in order to extract system concepts, concepts, aggregates, possible values or operations. The following are the parts of the wizard interface.

Concept

to select a Concept from the string to be resolved. After selection, a concept name needs to be chosen by right-clicking at the right of the field.

System Concept

to select a System Concept from the string to be resolved.

There can't be both a Concept and a System Concept within a string to be resolved.

Aggregation

to select an aggregate from the string to be resolved.

Attribute

to select an attribute from the string to be resolved.

Operation

to select an operation from the string to be resolved.

With the wordnetdata directory under the working directory (containing all wordnet data files), the system will detect the operation for you automatically. But this detection is based on extracting the operation under the assumption that its first word is a verb. But this is not guaranteed to work perfectly at all times as there could be words that belongs to both the noun and verb categories. In such a case you have to manually select the correct operation. If you don't have the wordnet data files then the system will require the user to select the operations manually.

A warning is displayed to the fact that the resulting model may be incorrect if the Next button is pressed while the string to be matched can't be obtained by concatenating all the selections made.