1     Definition

Physiological Signal Object includes:

  1. Physiological Signal Data representing biosignals captured from physiological processes  whose primary structure is a sampled temporal sequence representing time‑series measurements acquired from sensors that capture physiological activity of the human body. These signals are typically continuous or discretely sampled waveforms, possibly multichannel, accompanied by metadata describing the acquisition conditions, sensor characteristics, and timing information.
  2. Physiological Signal Qualifier specified by MPAI-TFA providing information about the Sub-Types, Formats and Attributes of the Physiological Signal Data.

2       Functional Requirements

Physiological Signal Data satisfies all the following requirements::

  1. Time‑Series Structure The data consists of one or more sequences of samples ordered in time.
  2. Physiological Origin The measured signal reflects a physiological process (e.g., cardiac, muscular, ocular, respiratory, vascular, electrodermal).
  3. Sampling Information The data includes or is associated with sampling metadata (e.g., sampling rate, units, channel count).
  4. Sensor‑Based Acquisition The signal is obtained from a physical sensor or biosignal acquisition device.
  5. Channel Semantics Each channel corresponds to a defined physiological measurement (e.g., ECG lead, EMG electrode, airflow sensor).
  6. Acquisition Metadata The data includes metadata describing the recording context (e.g., device, subject, start time, optional annotations).

3       Syntax

https://schemas.mpai.community/AIH1/V1.0/data/PhysiologicalSignalObject.json

4       Semantics

Label Description
Header Physiological Signal Object Header – Standard “AIH-PSO-Vx.y”
PhysiologicalSignalObjectID Identifier of the ECG Object.
EndUserID ID of End User the ECG Data refers to.
PhysiologicalSignalObjectTime Time info of ECG Data.
PhysiologicalSignalData ECG Data per Qualifier.
PhysiologicalSignalQualifier ECG Qualifier.
Trace Provenance information and Time of production.
DescrMetadata Descriptive Metadata