New NGSI linked data generator for every data model

Now the README file of every data model includes a link to the generator of NGSI-LD payloads compliant with the data model.

As you can see in the image below there is a new section “Dynamic examples generation

There is the sentence “Link to the Generator of NGSI-LD payloads compliant with this data model. Refresh for new values”. By clicking the Generator link an example of payload appears on the web page. Refreshing (F5) generates new payloads.


Updated interactive specification

Now all data models have an interactive specification. (As long as they have examples)
This is the first step to deeper interactive services for every data model contributed.
See the example for weatherForecast.

First Survey to users and contributors of Smart Data Models

    Q1: What elements of a smart data model are useful for you?

    Examples of the options:
    1.-Json Schema
    Mark those relevant for you

    Optional. Other element useful. (Available or desired)

    Q2: What services do you use?

    1.- Search data models
    2.- Validation of payload
    3.-Validate schema before contribution
    4.-Generate a NGSI-LD payload out of a schema
    Search data modelsValidation of payloadValidate of json schema before contributionGenerate a NGSI-LD payload out of a schema
    Optional. Other services missing. (Available or desired)


    Member of FIWARE FoundationMember of TMForumMember of IUDXNo membership

    Include userAlias in common-schema.json

    The file common-schema.json compiles those properties massively used across the different data models in the different domains.
    The property userAlias has been included to store those anonymous identifiers of a user that cannot be traced back to the user.
    It can be referenced in any data model just by including this code

    “userAlias”: {
    “$ref” : “”

    Updated the contribution manual

    This a general review of the contributions’ manual with these changes:

    • Recommendation how to document a property that is an object referencing to a shared schema
    • Change order in the elements (schema recommendation is the most demanded documentation and it is being placed at the beginning)
    • Minor reviews, contact point, etc.

    Located in the upper menu of the site.

    Update the database for searching properties and descriptions

    It has been updated the database for searching properties, two main improvements:

    1.  Performance (now it is a database query instead of the former static file)
    2.  The reference model of the property
    3.  The format (uri, date-time, etc) for string properties.


    Alpha version of the service for generating an NGSI-LD payload based on a Smart Data Model

    This is an alpha version (so you can expect errors and not being complete). Use it at your own risk. Please report errors and suggestions at


    Parameters: (Mandatories)

    • schemaUrl: The link to the RAW version of the json schema (see example)
    • email: your email


    Use any data model from Smart Data Models initiative and paste it into the form. Then you’ll get a page with a random payload compliant with the data model. Refresh for more.

    You can also use this form

      This form generates a NGSI-LD payload compliant with a json schema from Smart Data Models.


      By using this form you agree with the storage and handling of your data by this website.

      After clicking it will appear a message confirming the submission

      It will take a while to redirect to the feedback on a specific page

      Thanks for being patient

      Script for checking a data model submission

      In the directory utils of the umbrella repository data-models there is a new python script that checks if a schema is properly documented and if the payload is correctly located and validates against the schema.