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An Item is a Data Type specified by MMM-TEC or other MPAI Technical Specifications for use in an M-Instance. All MMM-TEC Items are listed in Table 1.

An Item may be produced:

  1. By the activity of a Process, e.g., by sensing Media and producing Data, Qualifier, and Rights from the Universe.
  2. As a result of a request made by a human through a Process of that human or directly to the M-Instance.

Items are specified by MMM-TEC or by other MPAI Technical Specifications. Item specification includes Definition, Functional Requirements, JSON Schema and Semantics and may reference the Qualifier of the Item’s Data to signal the relevant characteristics or technologies of a Data Type.

A Item Instance may include the Rights , i.e., the set of Process Actions that may be exercised by certain Processes on an Item at certain M- or U-Locations and at certain Times.

Table 1 – Items (Data Types) Used in MMM-TEC

General MMM-BCF Certificate X MMM-MIN M-Instance X
MMM-CTO Contract Object X MMM-PCP P-Capabilities X
MMM-EVT Event X MMM-PRO Program Object X
MMM-IDF Identifier X MMM-RGT Rights X
MMM-ICP I-Capabilities X MMM-RUL Rule X
MMM-MCP M-Capabilities X MMM-UEN U-Environment X
MMM-MEN M-Environment X
Human&User MMM-ACC Account X MMM-PPR Personal Profile X
MMM-ACD Activity Data X MMM-PDT Personal Data X
Process Interaction MMM-IPP IPP Message X MMM-PAC Process Action X
MMM-MSG Message X MMM-RES Resolution X
Service Access MMM-AUT Authentication X MMM-VLD Validation X
MMM-BDV Basic Discovery X MMM-DVO Discovery Object X
MMM-BIF Basic Information X MMM-IFO Information Object X
MMM-BIT Basic Interpretation X MMM-ITO Interpretation Object X
Finance MMM-ASS Asset X MMM-TRA Transaction X
MMM-CUO Currency Object X MMM-VAL Value X
MMM-PRV Provenance X MMM-WAL Wallet X
Perception OSD-3DO 3D Model Object X OSD-3EV 3D Model Event Descriptors X
OSD-3SD 3D Model Scene Descriptors X OSD-3SG 3D Model Scene Geometry X
OSD-AUO Audio Object X OSD-AEV Audio Event Descriptors X
OSD-ASD Audio Scene Descriptors X OSD-ASG Audio Scene Geometry X
OSD-AVO Audio-Visual Object X OSD-MEV Audio-Visual Event Descriptors X
OSD-MSD Audio-Visual Scene Descriptors X OSD-MSG Audio-Visual Scene Geometry X
OSD-SPO Speech Object X OSD-SEV Speech Event Descriptors X
OSD-SSD Speech Scene Descriptors X OSD-SSG Speech Scene Geometry X
OSD-VIO Visual Object X OSD-VSG Visual Event Descriptors X
OSD-VSD Visual Scene Descriptors X OSD-VSG Visual Scene Geometry X
  OSD-AUS Audio Source X OSD-LTS Light Source X
  OSD-OAC Object Audio Characteristics X MMM-RIT R-Item X
  OSD-TXO Text Object X
Internal State MMC-EGS Cognitive State X MMC-EPS Personal Status X
MMC-EEM Emotion X MMC-ESA Social Attitude X
Space&Time MMM-BML Basic M-Location X OSD-OPS Position X
OSD-BTW Basic Time X OSD-SPT Space-Time X
MMM-BUL Basic U-Location X OSD-SPA Spatial Attitude X
MMM-MLC M-Location X OSD-TIM Time X
OSD-OOR Orientation X MMM-ULC U-Location X
OSD-OPV Point of View X MMM-UMM Universe-Metaverse Map X

Table 1 references Object, Scene Descriptors, Scene Geometry, and Event Descriptors for 3D Model, Audio, Audio-Visual, Speech, and Visual. However, MMM-TEC implementations may also utilise the specific media versions of other Data Types: LiDAR, Offline Map, RADAR, and Ultrasound.

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