| attribute |
| field_name | name | domain | description |
| the identifier of the attribute | the name of the attribute | the domain for the attribute | a description for the attribute |
| attr_gen | Generic_Name | Generic_Name | A curve name, as might appear in a dictionary of 'required' or 'essential' curves for an oil company well log database. |
| attr_obj | Object | Object | a class of object. For well log curves, typical objects are the tool acquiring the log and the formation adjacent to it, whose respective classes are Tool ('TOOL') and Formation ('FM'). |
| attr_tech | Technique | Technique | a method of acquiring, deriving, or computing the value of a property. For well log curves, typical techniques are Acoustic ('AC') and Neutron ('NEU'). |
| attr_pty | Property | Property | a specific aspect, characteristic, attribute, or relation used to describe an object. Typically the property implies the quantity type and units class of the value. Typical properties are 'Resistivity', 'Diameter', 'Temperature', ... |
| attr_mod_a | Modifier A | Modifier | a qualifier which modifies the meaning of Object or Property, for example Deep ('DEP'), Average ('AVE'). |
| attr_mod_b | Modifier B | Modifier | a qualifier which modifies the meaning of Object, Property, or Modifier A. |
| attr_func | Function | Function | a derivation of a Property; typically the the quantity type and units are different than that implied by Property, for example Quality Indicator ('QUAL'). |