8.3 Material emp schema

8.3.1 metadata

The key meta information about the EMP look-up table.

Type: object
Required: Yes

8.3.1.1 name

The display name of the material, such as 'Red brick' or 'Dark asphalt'.

Type: string
Required: Yes

8.3.1.2 description

Short description of the material in 2 - 3 sentences.

Type: string
Required: No

8.3.1.3 uuid

Universally unique identifier for the material in 8-4-4-4-12 format, see en.wikipedia.org/wiki/Universally_unique_identifier. The uuid stays the same, even if version is updated.

Type: string
Pattern: \\b[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\\b$
Required: Yes

8.3.1.4 materialVersion

The version number of the material, following semantic versioning (e.g., '1.0.0').

Type: string
Pattern: ^\\d+\\.\\d+\\.\\d+$
Required: Yes

8.3.1.5 openMaterialVersion

The version of the OpenMATERIAL 3D specification used, adhering to semantic versioning (e.g., '1.0.0').

Type: string
Pattern: ^\\d+\\.\\d+\\.\\d+$
Required: Yes

8.3.1.6 copyright

Indicates copyright details, including the year and copyright holder (e.g., '© 2024 ACME Inc.').

Type: string
Required: Yes

8.3.1.7 license

Describes the license for material distribution. Use an SPDX identifier for open-source licenses (e.g., 'MIT'), or provide a URL or filename for proprietary licenses.

Type: string
Required: Yes

8.3.1.8 author

Lists the author(s) of the material as a name, email, or company. Multiple authors should be comma-separated.

Type: string
Required: Yes

8.3.1.9 creationDate

The date and time of material creation, formatted as YYYYMMDDTHHMMSSZ according to ISO 8601 (e.g., '20240703T101728Z').

Type: string
Pattern: ^\\d{8}T\\d{6}Z$
Required: No

8.3.1.10 source

Source of the electro-magnetic property data. Was is measured, simulated, or taken from literature?

Type: string
Required: Yes

8.3.2 electromagneticProperties

Array of electromagnetic property values, with each item representing a different property. The array SHALL be sorted based on the columns starting with the first.

Type: array
Required: Yes

Columns of the table:

  • Column 1: Wavelength of radiation in meters.

  • Column 2: Temperature of material in Kelvin.

  • Column 3: Humidity of material in percent.

  • Column 4: Real part of complex permeability of material.

  • Column 5: Imaginary part of complex permeability of material.

  • Column 6: Real part of complex permittivity of material.

  • Column 7: Imaginary part of complex permittivity of material.