M-Layer Development
The NCSLI 141 MII Committee collaborates to develop a metrology-information layer for digital measurement data and applications thereof.
Papers
Presentations
- M-Layer concepts for CIPM Expert Group
- M-Layer implementation for CIPM Expert Group
- M-Layer model for CDI integration
- WMD at NRC: Relations to DX
- M-Layer implementation for MII
Data Model Drafts
- M-Layer Data Model Draft v0.04
- M-Layer Data Model Draft v0.03
- M-Layer Data Model Draft v0.02
- M-Layer Data Model Draft v0.01
- M-Layer Data Model Draft v0.00
MII-Specific Development Files & Projects
The MII Team has the following projects in process or completed online for demonstration:
- Quantities and Units Schema
- Accreditation Scope XML Schema
- CMC Schema
- MII Accreditation Scope Editor
- Metrology.NET XML SoA access library
- MII Geo Search Demo
- MII Smart CMC Search Demo
Measurand Taxonomy
Older Information
We have also begun sketching taxonomies for measured quantities. The following experimental files propose MII quantity names and the MII Category and Subcategory names under which to organize them. For comparison, the files show the related taxonomy excerpts that other organizations currently use or proposed. Each file has a tab listing the methodology for developing the sub-taxonomy, the results and references, plus measured quantities extracted from actual SoAs, measurement techniques and objects of interest extracted from the BIPM CMCs.
As an example of the issues we will encounter and should solve, consider how we normally think of temperature—a single quantity that we may express in various units, including the degree Celsius and the kelvin. World metrology authorities, however, define among others, the separate quantities thermodynamic and Celsius temperature related by a quantity equation and not a unit conversion. What does that mean and why does it matter to the MII or its taxonomy? To raise awareness of the clarity with which the MII should represent measurement data, this rough white paper discusses temperature quantities.
This work now proceeds on GitHub (GitHub account and sign-in required), which we will use for new taxon submission, changes, reviews, and approvals. The NCSLI 141 MII & Automation Committee governs the process. Please refer to this short contribution guide for subject matter experts to get started.
Digital Calibration Certificates
The following projects have leaped ahead to develop calibration certificate formats: