The attributes are defined as being: simple value attributes that describe a single characteristic of the semantic object; group attributes that include one or more member attributes, which collectively describe a characteristic of the semantic object; formula attributes that set forth a formula, which describes a characteristic of a semantic object; or object link attributes that define {HEAD ~ a relationship} between {TAIL ~ one or more semantic objects} 
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The attributes are defined as being : simple value attributes that describe a single characteristic of the semantic object ; group attributes that include one or more member attributes , which collectively describe a characteristic of the semantic object ; formula attributes that set forth a formula , which describes a characteristic of a semantic object ; or object link attributes that define { HEAD ~ a relationship } between { TAIL ~ one or more semantic objects }
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