| wfid |
| Base Entity | AssocWaE |
| Attribute Name | wfid |
| Logical Rolename | |
| ColumnName | wfid |
| RoleName | |
| Definition | Waveform identifier. The key field is a unique identifier for a segment of digital waveform data |
| Note |
| evid |
| Base Entity | AssocWaE |
| Attribute Name | evid |
| Logical Rolename | |
| ColumnName | evid |
| RoleName | |
| Definition | Event identifier. Each event is assigned a unique integer which identifies it in a database. It is possible for several records in the Origin relation to have the same evid. This indicates there are several opinions about the location of the event. The evid does not have to be identical to the local network's event identifier, which is stored in the Origin table. This allows to merge data for a single event from multiple sources without insisting that database evid is identical to the source's local event identifier |
| Note |
| datetime_on |
| Base Entity | AssocWaE |
| Attribute Name | datetime_on |
| Logical Rolename | |
| ColumnName | datetime_on |
| RoleName | |
| Definition | Time of first datum |
| Note |
| datetime_off |
| Base Entity | AssocWaE |
| Attribute Name | datetime_off |
| Logical Rolename | |
| ColumnName | datetime_off |
| RoleName | |
| Definition | Time of last datum |
| Note |
| lddate |
| Base Entity | AssocWaE |
| Attribute Name | lddate |
| Logical Rolename | |
| ColumnName | lddate |
| RoleName | |
| Definition | Load date. Date and time that the record was created or last modified |
| Note |