Author: maestro

New subject mapping saref 4 buildings and 3 new data models

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There is a new subject datamodel.S4BLDG mapping the data models from SAREF for buildings 1.1.2.

Thanks to the contributors Grzegorz Wiszniewski and Jakob Bjørnskov t the project Twin4Build – A holistic Digital Twin platform for decision-making support over the whole building life cycle.

The original linked data descripton is also kept and a @context could be generated with the service home->tools -> map @context with external ontologies. In this video there is an explanation on how to do it.

For the moment 3 entities has been published but there are more on the queue

  • Actuator. An actuator is a mechanical device for moving or controlling a mechanism or system. An actuator takes energy, usually created by air, electricity, or liquid, and converts that into some kind of motion.

  • AirToAirHeatRecovery. An air-to-air heat recovery device employs a counter-flow heat exchanger between inbound and outbound air flow. It is typically used to transfer heat from warmer air in one chamber to cooler air in the second chamber (i.e., typically used to recover heat from the conditioned air being exhausted and the outside air being supplied to a building), resulting in energy savings from reduced heating (or cooling) requirements.

  • Alarm. An alarm is a device that signals the existence of a condition or situation that is outside the boundaries of normal expectation or that activates such a device. Alarms include the provision of break glass buttons and manual pull boxes that are used to activate alarms.

Illuminated roof of the skyscraper Millenia Tower at night in Singapore

MasterSheet for submission of simple data models

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We have released a master sheet that simplifies the contribution to the smart data models.

It uploads the data model to a new repository called drafted.

The video help is also available

Steps for using the spreadsheet

0.- Make a local copy in your google account and grant permission the first time you use it (it warns you that it is not validated by google, true, but anyhow go to advance and grant the permissions

1.- Include your example in json key values

2.- Include the name of the data model, its title, the subject, and the description together with your email

3.,- Describe the attributes, their NGSI type, their data type, and the written description.

And click on the two buttons

 

Extended context.jsonld in all data models

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Every subject — a group of data models — has a file named contex.jsonld at their root.

This file contains the @context with automatically generated IRI for the terms used in the data model.

The Entity types are also available in this file with their long IRI.  In the pointed example are the entries for “SeaConditions”, “WeatherAlert”, “WeatherForecast”, and “WeatherObserved”

Remember that if you want to use other IRI coming, for example, from existing ontologies you can use the service on the Home -> Tools -> Mapper @context with external ontologies

updated common-schema.json

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We have noticed an error in the description of the attribute location in the file common-schema.json, a file that is embedded in most of the data models. It does not affect the data types (so the validation of the schemas is not affected) but it affects the qualification of the NGSI type that it is not properly identified,

GeoProperty is written with capital middle P.

The file has been updated and soon it will be launched an update of all the data models affected.

EBSI Verifiable Credentials mapped as data models

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There is a new subject – Verifiable Credentials – in the Cross-Sector domain, with 5 data models derived from those at EBSI. Minor changes to be adapted as standard data models. Due to the fact that they are used only in key-values format the examples are only in this format. The @context defined has been removed because they are implicit attributes in NGSI-LD.

Check the derivedFrom metadata in every schema.json file to get to the EBSI source.

ebsi European Blockchain

pysmartdatamodels options in the tools menu

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New options for pysmartdatamodels package. There are a new element in he tools menu to access the pysmartdatamodels package, its documentation, or a code example.