looking for a tag e.g. squire/lady

[mariannevanharten]

I am looking for a GEDCOM tag that I can use for a predicate (“predicate” in Dutch).
TITL is not the correct tag to use.
There are different positions for these name types (before the first name, between the first name and last name, after the last name).
When a person has a predicate/title by birth and keeps it throughout their life, you can use TITL, NPFX, and NSFX, but if someone acquires a title through education or merit, I don't think that's possible.

[tychonievich]

If you mean the name part (the "Lady" in "Lady Diana") that's a NPFX (before first name) or SPFX (before last name) or NSFX (after last name) depending on where it appears.

In 7.0 (and 5.5.1 and before) there is no a single term for all three of those name parts in GEDCOM, nor a way to distinguish different type of prefixes/suffixes. For example, the following all use NSFX for very different logical name meanings

• NAME John /Doe/, Esquire with NSFX Esquire -- a job title or qualification
• NAME John /Doe/ Junior with NSFX Junior -- a recognition that others have had the same name
• NAME John /Doe/, 4th Earl of Gloucester with NSFX 4th Earl of Gloucester -- a title of nobility

That lack of power been discussed in a few different proposed revisions to the name structure for future versions of GEDCOM; see for example the issues tagged "names working group".

You can also record fact that an individual uses or has been awarded such an honorific, that's a g7:INDI-TITL. The combination of an INDI.TITL and an INDI.NAME.NSFX with the same payload could lead one to assume that the NSFX had that title type, but there is no direct way to record that relationship.