[NTR] Add absorbance

[StroemPhi]

Preferred term label

absorbance

Synonyms

Textual definition

A data item that quantifies the absorption of light by some material as the logarithm of the incident electromagnetic radiation power I₀ (before absorption), divided by the transmitted electromagnetic radiation power I (after absorption). A = lg(I₀/I) (dct:source https://doi.org/10.1351/goldbook, http://purl.allotrope.org/ontologies/result#AFR_0001157, https://en.wikipedia.org/wiki/Absorbance)

Link to CHARISMA Wiki equivalent

Absorbance

Suggested parent term

IAO:data item

Axiomatization

This needs to follow the design pattern that such data items are always about the physical characteristics of material entities, in this case, the characteristic of some material to absorb light. Hence we need to assert this relation in the form of the following SubclassOf axiom:
IAO:is about some PATO:absorption quality

Examples

Please provide a more detailed description that examplifies how the term is supposed to be used, in terms of what it is suppose to repesent (e.g. a concept or a relation).

Attribution

ORCID:0000-0002-1595-3213, ORCID:0000-0001-7694-5519

[StroemPhi]

Changed the parent and definition after also reading the Wikipedia entry. I wouldn't consider it a measurement datum but rather only a data item, as I assume it is not measured directly but calculated from other measurements. What is also still an open question for me regarding the GoldBook definition, is whether we should additionally define attenuance as a child of absorbance to account for scattering effects?

Edit: according to @Zack-83 attenuance should not be considered a child of absorbance. I would thus ignore it for now.