MII Development Resources

The MII requires universally recognized and understood terminology, and specifically, machine-recognizable data. When creating MII documents, many data elements may therefore only take on values from a predetermined and recognized finite list. This page provides developer resources for building or referencing such lists. Applicable data elements include measured quantities, approved accreditation bodies, documentary standards, measurement activity types, measurement discipline categories and subcategories, etc.

Quantities & Units, Taxonomies

The SI Brochure
International Vocabulary of Metrology (VIM)
Quantities, Units, Dimensions and Types: QUDT Overview and Schema
ISO-IEC 80000
NIST Special Publication 330, "The International System of Units"
NIST Special Publication 811, "The NIST Guide for the use of the International System of Units""
IUPAC Ontology Overview and Research Compilation
SWEET (JPL's Semantic ontology, includes quantities)

Related Projects

UnitsML (A NIST XML schema for quantities and units, a unit database, and a Web UI)
MathML (XML schema for mathematics representation and presentation)
ATML (Automatic Test Markup Language - encapsulates data related to electronic testing)
MIMOSA (Machinery Information Management Open Systems Alliance)
Quality Information Format (QIF) (a format to represent physical objects from design to measurement)
AnIML (XML to capture analytical chemistry data)
“XML for Data Curation” (An NPL pilot to process calibration data and generate certificates)
European Metrology Cloud (A digital single market and quality infrastructure)

Accreditation Scope Resources

Original NCSLI High-Level Data Model
ILAC G18:04/2010 (Guideline for the Formulation of Scopes of Accreditation for Laboratories)
NCSLI RP-9 (Laboratory Capability Documentation Guideline (2014))
NVLAP Parameter Selection List

Accreditation Body (AB) Identification
ILAC (International Laboratory Accreditation Cooperation) provides the authoritative source data for ABs. The Accreditation Body Reference Data.zip file provides resources and explanations for MII data elements that depend on ILAC information.

Instrument Specs Resources

Original NCSLI High-Level Data Model
A number of organizations have gathered databases of manufacturers' specifications for test equipment. See below for a list of resources:

1. Government Industry Information Exchange Program (GIDEP)
GIDEP (Government-Industry Data Exchange Program) is a cooperative activity between government and industry participants seeking to reduce or eliminate expenditures of resources by sharing technical information essential during research, design, development, production and operational phases of the life cycle of systems, facilities and equipment.

Calibration & Test Certificate Resources

Original NCSLI High-Level Data Model
VDI/VDE 2623, “Format for Data Exchange in Management of Measuring and Test Equipment – Definition of Calibration
Data Exchange-Format (CDE-Format)”
TEDS (Transducer Electronic Data Sheet)
Calibration data format (CDF)

Uncertainty Representations

Uncertain Numbers (object classes that propagate uncertainty through math operations on numeric values)
GUM Tree Calculator (GTC) (uncertainty propagation via coded measurement equations)
METAS UncLib (uncertainty calculation and storage library)
UncertML (multiple format XML uncertainty representation)

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