The rationale for each relationship or link should also be documented so the meaning is understood. For example, an Activity may be conducted on a Land and an Accident may be a result of a hazardous land or produce a victim. These relationships are used when entering data to ensure that the links between items are available for searching and reporting, like when searching for all land Land that have clearances Accidents linked to them.
{{Document|<b>Document the following business rules about assigning and linking:</b>
* which items will have links between them, for example, victims will Victims should always be linked to accidentsAccidents* rationale or logical meaning of the relationships between items, for example, a link between a Clearance and a Land an Accident means that the Accident happened during the Clearance was conducted on that Land
* what effects linking has on the items, for example, a link between a Clearance and Land may indicate that the land status should change from ''Open'' to ''Worked on''
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