URI: http://w3id.org/glosis/model/codelists/boundaryClassificationValueCode
The boundary between mottle and matrix is described as the thickness of the zone within which the colour transition can be located without being in either the mottle or matrix. See more in guidelines for Soil Description issued by the FAO: table 35
Code list for BoundaryClassificationValue - codelist class
This code list provides possible values for boundaryClassification.