These notes provide additional information about the modifierId column in the Relationship File. The modifierId column was included in the specification of the relationships file in the expectation that it would in future distinguish between different types of description logic axiom. However, in practice it has not been used. Different approaches to enhanced use of description logic are under consideration and it now seems unlikely that this column will be used as originally intended. Therefore, until further notice it is recommended that the contents of this column should be ignored.
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| Info |
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| title | Original release notes on modifierId |
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The | Specref |
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| RefType | (field) |
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| t | modifierId |
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field will initially be set to | Concept |
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| t | 900000000000451002|Some| |
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| ShowFormat | inline |
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to keep compatibility with the release. Widening the range of this field to include other values (such as |All|) will in future increase the expressive power of However, this is likely to come at the cost of an increase in reasoning complexity, leading to potential issues for classification tooling. Notes: The modiferId field has been included at this stage as the format is likely to be stable for at least a five year period, without addition or deletion of fields. Within that period it is anticipated that other | Specref |
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| RefType | (field) |
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| t | modifierId |
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values will be added. Therefore, although not fully implemented at this stage, this field has been included in the initial RF2 specification as it represents an integral part of the | Gloss |
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| Space | true |
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| t | Description Logic |
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used by Any expansion of to include with a | Specref |
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| RefType | (field) |
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| t | modifierId |
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set to a value other than | Concept |
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| t | 900000000000451002|Some| |
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| ShowFormat | inline |
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will be discussed with prior to introduction. - Changes have been made to the "Immutability" values shown in the above table in the 2014-07-31 version. These changes reflect the fact that the values in the following columns of a uniquely identified relationship have occurred in historical data and in these cases tracking the history of these changes is of greater value that insisting on immutability.
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