EthOn_Contracts.ttl property bugs

[dmuhs]

The stackItemsAdded and stackItemsRemoved seem to be swapped throughout the EthOn_Constracts.ttl file. While the yellowpaper shows that e.g. ADD deleted two elements from the EVM stack and adds another one to it, the respective EthOn definition is as follows

:Opcode_ADD a owl:NamedIndividual , :Opcode ;
	:cost "3"^^xsd:integer ;
	:hexValue "01"^^xsd:hexBinary ;
	:name "ADD"^^xsd:string ;
	:stackItemsAdded "2"^^xsd:integer ;
	:stackItemsRemoved "1"^^xsd:integer ;
	rdfs:comment "Addition operation."@en .

This leads to some amusing entries, which apparently have gone undetected such as

:Opcode_POP a owl:NamedIndividual , :Opcode ;
	:cost "2"^^xsd:integer ;
	:hexValue "50"^^xsd:hexBinary ;
	:name "POP"^^xsd:string ;
	:stackItemsAdded "1"^^xsd:integer ;
	:stackItemsRemoved "0"^^xsd:integer ;
	rdfs:comment "Remove item from stack"@en .

This issue seems to affect the whole file and potentially others.