duplicate classes

[VladimirAlexiev]

Consider these classes:

• uncefact:Certificate "A legal proof of ownership or worthiness of an item."
• uncefact:Certification "The process of ensuring that a certain object, process, or activity has passed performance and quality assurance tests or qualification requirements." ;

From the description it seems each is needed: one is a process, the other is the documentary result of that process. But if you check the applicable props of uncefact:Certification and their descriptions:

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX uncefact: <https://service.unece.org/trade/uncefact/trade/uncefact/vocabulary/uncefact#>
PREFIX schema: <http://schema.org/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
select * {
    {?incoming schema:domainIncludes uncefact:Certification; rdfs:comment ?descr}
    union {?outgoing schema:rangeIncludes uncefact:Certification; rdfs:comment ?descr}
}

incoming	descr	outgoing
uncefact:assertion	"An assertion, expressed as text, for this trade product certification, such as that this product is free from peanuts."
uncefact:assertionCode	"A code specifying an assertion for this trade product certification, such as claims that a product is free from peanuts."
uncefact:responsibleAgency	"The agency, expressed as text, responsible for this trade product certification."
uncefact:standard	"The standard, expressed as text, for this trade product certification."
	"A certification applicable to this trade product."	uncefact:applicableCertification

It becomes clear that is also the result, not a process. Therefore the two classes must be merged.

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We need to examine all classes with similar names for potential duplication.