Chemical constraint
[Wikipedia] In chemistry, a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent.
Dissolved
Aluminium
Arsenic
Bromine
Carbon
Carbon dioxide
Copper
Ammonium
Antimony
Beryllium
Boron
Cadmium
Calcium(2+)
Hydrogencarbonate
Chloride
Chlorine
Chromium
Cobalt
Oxygen
Iron
Lead
Magnesium(2+)
Magnesium
Manganese
Methane
Nickel
Nitrate
Nitrite
Nitrogen
Nitrous oxide
Phosphate
Phosphorus
Potassium(1+)
Potassium
Sulfur hexafluoride
Silicon dioxide
Silicon
Sodium(1+)
Sodium
Strontium
Sulfate
Titanium
Uranium
Vanadium
Zinc
Radon
Lithium
Molybdenum
Rubidium
Caesium
Mercury
Tungsten
Barium
Cerium
Dysprosium
Erbium
Tin
Europium
Gadolinium
Holmium
Lanthanum
Lutetium
Neodymium
Praseodymium
Samarium
Terbium
Thorium
Thulium
Ytterbium
Zirconium
Yttrium
Gallium
Argon
Neon
Bromide
Tetrachloromethane
Fluorocarbon 113
Dichlorodifluoromethane
Chloroform
Methyl chloroform
Thallium
Tellurium
Tantalum
Niobium
Germanium
Rhenium
Scandium
Bismuth
Hafnium
Silicic acid
Tritium
Silver
Concept
SKOS Concept
definition
A statement or formal explanation of the meaning of a concept.
is in scheme
Relates a resource (for example a concept) to a concept scheme in which it is included.
preferred label
A resource has no more than one value of skos:prefLabel per language tag, and no more than one value of skos:prefLabel without language tag.
The range of skos:prefLabel is the class of RDF plain literals.
skos:prefLabel, skos:altLabel and skos:hiddenLabel are pairwise disjoint properties.
The preferred lexical label for a resource, in a given language.
has broader
Broader concepts are typically rendered as parents in a concept hierarchy (tree).
Relates a concept to a concept that is more general in meaning.
has exact match
skos:exactMatch is disjoint with each of the properties skos:broadMatch and skos:relatedMatch.
skos:exactMatch is used to link two concepts, indicating a high degree of confidence that the concepts can be used interchangeably across a wide range of information retrieval applications. skos:exactMatch is a transitive property, and is a sub-property of skos:closeMatch.
A Constraint constrains other components in the Variable description.