Reviewing and fixing issues regarding schemas, headers and parameters sections within the NGSI-LD OAS 1.6.1.

Show the @context field on top of the request and response/request bodies for the Registry API operations for Temporal Context Information Consumption operations.

Adding the default value of 0 for aggrPeriodDuration query parameter as mandated from 5.7.4 Query Temporal Evolution of Entities and 5.7.3 Retrieve Temporal Evolution of an Entity operations.

Adding the System Attributes options parameter for 5.7.3 Retrieve Temporal Evolution of an Entity operation as deduced from clause 6.3.11.

Deleting scopeQ and limit extra parameters and skipping the required: true argument for timerel and timeAt query parameters from 5.7.3 Retrieve Temporal Evolution of an Entity operation.

Adding the alternative keyword simplified as synonym of keyword keyValues, as mandated from clause 6.3.7.

Adding the System Attributes options parameter for 5.7.4 Query Temporal Evolution of Entities operation as deduced from clause 6.3.11.

Adding the default value of observedAt within th timeproperty query parameter as defined by 5.7.3 Retrieve Temporal Evolution of an Entity and 5.7.4 Query Temporal Evolution of Entities operations.

Show the @context field on top of the request and response bodies for the Context Information Consumption operations. Fixing issues with examples regarding /type /attributes endpoints for considering the @context inside the items section for EntityType[] and Attribute[] schemas.

Update shared summary and operationId for 5.7.8 Retrieve Available Attributes and 5.7.9 Retrieve Details of Available Attributes operations.

Update share summary for 5.7.5 Retrieve Available Entity Types and 5.7.6  Retrieve Details of Available Entity Types operations.

Fixing some issues within the NGSI-OAS v1.6.1 regarding Context Information Consumption operations: 1) Fixing tags section for 5.8.3-Retrieve Subscription y 5.8.4-Query Subscriptions to Context Information Subscription; 2) Including description of 5.7.6-Retrieve Details of Available Entity Types operation together with the 5.7.5-Retrieve Available Entity Types operation; 3) Including description of 5.7.9-Retrieve Details of Available Attributes operation together with the 5.7.8-Retrieve Available Attributes operation; 4) Fixing the EntityTypeList type definition within schema content of the response for 5.7.5-Retrieve Available Entity Types operation and 5.7.6-Retrieve Details of Available Entity Types operations. Pending actions: solving doubts with the definition of the parameters Query.geometryProperty, Query.geoproperty, and Query.options.entities, and Query.datasetId.

Adding a folder for defining examples of custom OpenAPI schemas that are compliant with the NGSI-LD OAS.

Eliminate the required option within the Subcription.Periodic schema for fields entities and timeInterval. Move the required option for the entities fields to the schemas statement of the Subscription request body.

Fixing an indentation issue with the additionalProperties field in the Schemas of Entity and Relationship within the NGSI-LD OAS.

Update links within the README file and add a link to view the original NGSI-LD OAS in the Swagger Editor of ETSI Forge.

Create an initial fork repository to work on the OpenAPI Specification (OAS) for the NGSI-LD API specified by the cross-cutting Context Information Management (CIM) ETSI Industry Specification Group (ISG).