The following table lists GEDCOM extension tags used by Family Historian.
| Tag | Definition |
|---|---|
| __PREFERRED | ‘Preferred’ fact flag. |
| __PRIVATE | ‘Private’ fact flag. |
| __REJECTED | ‘Rejected’ fact flag. |
| __TENTATIVE | ‘Tentative’ fact flag. |
| _AREA | Used with ‘frame’ links to a Media record image. Specifies the position of the frame. |
| _ATTR | Attribute. Used with custom attributes only. |
| _AUTO | Used with the Source record TITL tag, to indicate that the Source record title is auto-generated (value = ‘1’). |
| _CAPT | Has value ‘Y’ if the option Use Note as Caption is ticked for a given Media link. |
| _DATE | Same as standard DATE tag, used in non-standard contexts. |
| _EXCL | Used with Media links to indicate that the linked Media record (normally an image) should be excluded from diagrams (“DGM”), reports (“RPT”) or both (“ALL”). |
| _FIELD | Metafield: a self-documenting field. Used with templated Source records and citations. |
| _FLAG | Used with named lists. If set to ‘E’ means that record editing is enabled for this named list. |
| _FLGS | Parent tag for record flag tags. |
| _FMT | Text format. ‘1’ indicates a field in FTF format (Family Historian Text Format). Any other value, or none, indicates a plain text field. |
| _IDS | Record id list. Used as a child of a _LIST tag, to specify the records in the list. |
| _KEYS | Keywords. |
| _LINK_B | A link from a rich text note to a Submission record. |
| _LINK_E | A link from a rich text note to a Research Note record. |
| _LINK_F | A link from a rich text note to a Family record. |
| _LINK_I | A link from a rich text note to an Individual record. |
| _LINK_N | A link from a rich text note to a Note record. |
| _LINK_O | A link from a rich text note to a Media record |
| _LINK_P | A link from a rich text note to a Place record |
| _LINK_R | A link from a rich text note to a Repository record. |
| _LINK_S | A link from a rich text note to a Source record. |
| _LINK_T | A link from a rich text note to a Source Template record. |
| _LINK_U | A link from a rich text note to a Submitter record. |
| _LIST | Named list. |
| _LKID | Link identifier. Used with links from rich text notes (see above). |
| _NOTE | Note. |
| _NOTA | Annotation (usually an annotation of an image). |
| _PCIT | Prepared citation. |
| _PLAC | Place. Is used with Place records and non-standard place fields, such as the ‘Place (to)’ with an Emigration event, and the ‘Place (from)’ for an Immigration event. |
| _RNOT | Research note. |
| _ROOT | Link to the project root. |
| _SDATE | Sort date. |
| _SENT | Sentence field. Used for ‘sentence overrides’ of a fact or witness sentence, for narrative reports. |
| _SEQ | Sequence number. Used to determine ordering. |
| _SHAN | ‘Name-only’ witness to a shared event. |
| _SHAR | Link to a witness to a shared event. |
| _SRCT | Link from a Source record to its associated Source Template record (if any). |
| _STAT | Status. Used to store marital status information (‘Divorced’, ‘Separated’, etc) in a Family record. |
| _TYPE | ‘Type’ information (where there is no standard ‘type’ field). For example, is used to store the ‘generic’ type of a generic source. |
| _UID | Globally unique identifier. |
| _USED | For names: given name used. For example, a person with the name “Arthur Brian Smith” might have always been known by their second name, ‘Brian’. In this case, ‘Brian’ would be the given name used. In header: last-used record ids. |
| _VAR | GEDCOM variant settings, used by Family Historian internally. |