Created question in FIWARE Q/A platform on 20-05-2021 at 07:05
Please, ANSWER this question AT https://stackoverflow.com/questions/67616280/fiware-entity-as-a-group-of-kpi-attributes

Question:
FIWARE entity as a group of KPI attributes

Description:
Our system needs to return several KPIs grouped in different topics:

Census:

citizens (number of inhabitants)
citizens without any studies
...

Information desk

Phone response time
Mail response time
...

Tax

Online payments
Window payments
...

To my understanding, it would make sense to have an entity for each topic and each KPI being a KeyPerformanceIndicator attribute. eg: This could work similar to:
{
"description": "Census Information system",
"dataProvided": {
"entities": [

],
"attrs":[ //THIS SEEMS AN INTERESTING APPROACH, BUT SADLY ALSO INVALID

,

,
//...
]
},
"provider": {
"http":

}
}

(TL;DR: "attrs" supports strings only, so can't return complex/data modeled types, like KPI)
Setting this happy idea aside, what it would be a good approach to solve this?
Must each KPI be an entity?
Is NGSI-LD what I'm looking for?