Mortar Data Model

This document presents an overview of the Mortar data model: how it combine Brick metadata with timeseries data, and how these two bodies of information are presented and managed.

Brick model with links to data

Brick Schema

The Brick schema, also referred to as the Brick ontology, is a formal data model for describing data sources and their context in a building. Refer to the Brick Ontology documentation page for details on the contents of the Brick ontology.

Brick Model

A Brick model is a graph-based representation of a particular building and its subsystems, processes and data sources. The terms, relationships, classes and other contents of a Brick model are drawn from the Brick schema.

Stream

Timeseries data is organized into streams; a stream is a sequence of timeseries data from a single source (e.g. a sensor channel). Streams are grouped by a SourceName, and are uniquely identified within that group by a name. This name will be the link between the timeseries data and the metadata which is captured in a Brick model. The Brick model will provide additional context such as units, type, location and related equipment and locations.

Note

Some vocabulary:

  • Site: a single facility; any building with its own street address

  • Timeseries: a sequence of values with associated times, e.g. the readings of a temperature sensor

  • Brick schema: the class hierarchy and relationships defined by Brick

  • Brick model: a directed graph representing the entities (class instances) and relationships present in a building and its subsystems