generated: '2026-06-20'
method: derived
source: json-schema/blpapi-core-messages-schema.json + openapi/
entities:
  - name: Security
    description: A Bloomberg security/topic (ticker + yellow-key or identifier), the subject of every request and subscription.
    schema: json-schema/bloomberg-security-schema.json
  - name: Field
    description: A Bloomberg field mnemonic (e.g. PX_LAST) from the API Data Dictionary (//blp/apiflds).
  - name: Subscription
    description: One streaming topic — service, topic string, fields, options, and its CorrelationID.
    schema: json-schema/blpapi-core-subscription-schema.json
  - name: SubscriptionList
    description: The batch of Subscriptions passed to Session.subscribe.
    schema: json-schema/blpapi-core-subscription-list-schema.json
  - name: MarketDataEvent
    description: A streamed SUBSCRIPTION_DATA payload (LAST_PRICE, BID, ASK, sizes, event type/subtype).
    schema: json-schema/blpapi-core-market-data-event-schema.json
  - name: CorrelationId
    description: Client-assigned identifier binding requests/subscriptions to their events and messages.
  - name: ErrorMessage
    description: The BLPAPI error envelope (source, errorCode, category, subcategory, message).
    schema: json-schema/blpapi-core-error-message-schema.json
  - name: Request
    description: >-
      Request/Response paradigm messages — ReferenceDataRequest, HistoricalDataRequest,
      IntradayBarRequest, IntradayTickRequest, FieldInfoRequest, FieldSearchRequest.
    schema: json-schema/blpapi-core-messages-schema.json
relationships:
  - from: SubscriptionList
    to: Subscription
    kind: has_many
    via: items
  - from: Subscription
    to: Security
    kind: belongs_to
    via: topic
  - from: Subscription
    to: Field
    kind: has_many
    via: fields
  - from: Subscription
    to: CorrelationId
    kind: has_one
    via: correlationId
  - from: Subscription
    to: MarketDataEvent
    kind: has_many
    via: SUBSCRIPTION_DATA events
  - from: Request
    to: Security
    kind: has_many
    via: securities
  - from: Request
    to: Field
    kind: has_many
    via: fields
  - from: Request
    to: CorrelationId
    kind: has_one
    via: correlationId
  - from: Request
    to: ErrorMessage
    kind: has_one
    via: responseError
  - from: MarketDataEvent
    to: CorrelationId
    kind: belongs_to
    via: correlationId