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GUID

This function is able to generate a globally unique identifier which can later be used to uniquely mark and recognize a desired element. The GUIDs are represented as 32 hexadecimal digits, displayed in five groups separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters.

Syntax

Code Block
GUID()

Return type

  • String - the generated GUID

Examples

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TYPE OF


Use this function to determine Determines the entity type of an instance. The function returns the name of the entity.


Syntax

Code Block
TYPE OF base_entity


Input

  • base_entity - Name of the instance's base entity.


Return type

  • string


Examples

Suppose a domain model in which there is a singleton entity Residence that has a multivalued relation hasRooms with Room. Room is the base entity for singleton Kitchen and not singletons Bedroom and Bathroom.

  • for the Kitchen instance the expression ( TYPE OF Room ) = “Kitchen”
  • for the Bedroom instances the expression ( TYPE OF Room ) = “Bedroom”

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ISACTIVE

Use this function to determine if an instance of a specific type is currently active.

Code Block
ISACTIVE instances [WHERE condition]

Inputs

  • instances - instances to search
  • condition - optional condition to limit the collection of instances to check

Return type

Boolean - TRUE if one of the instances is active, FALSE otherwise

UI Text Box
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Singletons are always active, so ISACTIVE <singleton> will always return TRUE 

Examples

Suppose the following data model.

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