Page History

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• Developer Documentation
  • https://developer.c3.ai/docs/7.12.17/topic/mda-type-composability
  • https://developer.c3.ai/docs/7.12.17/topic/mda-schema-name-and-type-key
  • https://developer.c3.ai/docs/7.12.0/topic/tutorial-type-inheritance
• C3.ai Academy Videos
  • C3 Fundamentals module 'TypeSystem': https://learnc3.litmos.com/course/3802349/module/7466519
    • Type Inheritance
    • Schema Name and Type Key
    • Type Composability

Annotations

Annotations can appear before Type definitions, field declarations, and method declarations. They do a variety of things such as configure the database technology used to store that Type, mark what type of ActionRuntime should be used to run a method, Mark a field or method as deprecated or beta, Specify a timeseries treatment, and specify parameters of C3 Analytics (discussion to come soon). These are only a selection of what annotations can do.

Here, we show a couple of examples:

  /**
   * This bulb's historical predictions.
   */
  @db(order='descending(timestamp)')
  bulbPredictions: [SmartBulbPrediction](smartBulb)

The bulbPredictions field is annotated that the database should store the bulbPredictions in descending order by timestamp.

@ts(treatment='avg')
lumens: double

The lumens field of a type be default is now going to use the 'AVG' treatment.

C3.ai developer resources on Annotations:

• Developer Documentation
  • https://developer.c3.ai/docs/7.12.17/topic/mda-annotations
  • https://developer.c3.ai/docs/7.12.0/type/Annotations
• C3.ai Academy Videos
  • C3 Fundamentals module 'TypeSystem': https://learnc3.litmos.com/course/3802349/module/7466519
    • Annotations
    • Db Annotations

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