MetaModel

Draft

This is a preliminary version of the VDM documentation.

MetaModel definition

Virtual datamodels provide unified data interface for applications connected to AVAplace platform. Virtual datamodels provide clear and unambiguous interconnection to support integration of loosely coupled applications. Virtual datamodels represent key items to establish ubiquitous language across integrated applications (see Domain Driven Design for more details).

System Properties

• id - the unique identifier of virtual record, struct: modelId (GUID) + recordId (GUID)
• externalId - the fully qualified unique identifier of source record (i.e. source record, source entity and data source)
• sourceId - the identifier of publisher data-source (GUID)
• referenceId - (optional) the reference identifier of original record from primary data-source (GUID)
• mandantCode - (optional) mandant/organization identifier, null = non-mandant record
• deleted - (optinal) flag that record has been marked as deleted

Entity Types

• AggregateRoot - data are persisted as standalone records and can be queried separately
• NestedEntity - data are persisted as aggregate(s) of master record and can't be queried separately

Field Types

Name	Description
Text	single-line text (string)
MultilineText	multi-line text (string)
TwoOptions	two-value switch (boolean)
WholeNumber	whole number (long)
DecimalNumber	decimal number (decimal)
CurrencyNumber	currency number (decimal value with currency code of ISO 4217 - alphabetic)
UniqueIdentifier	unique identifier (guid)
Date	date without time
UtcDateTime	date and time in UTC
LookupEntity	association type relationship to aggregate root entity
NestedEntity	value object or composition type relationship to nested entity
FileReference	structured contract representing a link to the file stored in Content Manager service
SingleSelectOptionSet	single-select value of predefined option set
MultiSelectOptionSet	multi-select value of predefined option set