Does Gramps export attributes to GedCom?

Good evening,

I hope I’m posting in the right category.(else, pls tell me)

I’m starting to use Gramps Desktop vAIO64-6.0.3–1.(on Windows)

I’m trying to convert my GedCom file (exported from Heredis) to make it compatible with Gramps.

I’m converting some non standard tags to NOTE, but I’d like to convert some others to attributes.

For example, I’d like to convert “1 WWW http://source.example.com” to a source attribute,
I’ve tried several solutions without success, including:

1 _ATTR URL http://source.example.com
or
1 _ATTR
2 TYPE URL
2 VALUE http://source.example.com

To find out what the tag label was, I did the opposite.

In gramps, I created an attribute in the source file

and exported the genealogy to GedCom.

Result: I can’t find the attribute (URL) I have created in the GedCom file.

Is this normal?


Many Thanks and have a great day(/night)

Exported gedcom file :
0 HEAD
1 SOUR Gramps
2 VERS AIO64-6.0.3–1
2 NAME Gramps
1 DATE 18 JUL 2025
2 TIME 22:43:18
1 SUBM @SUBM@
1 FILE C:\Tempo\Untitled_6.ged
1 COPR Copyright (c) 2025 .
1 GEDC
2 VERS 5.5.1
2 FORM LINEAGE-LINKED
1 CHAR UTF-8
1 LANG French
0 @SUBM@ SUBM
1 NAME
0 @I0002@ INDI
1 NAME Albert Joseph /DUPONT/
2 TYPE birth
2 GIVN Albert Joseph
2 SURN DUPONT
1 SEX M
1 BIRT
2 DATE 1 JAN 1900
2 SOUR @S0001@
3 PAGE Naissance de DUPONT Albert Joseph (Détails de la Citation)
3 QUAY 3
1 EVEN YES
2 TYPE SIGN
1 EVEN LEGITIMATE_CHILD
2 TYPE _FIL
1 CHAN
2 DATE 18 JUL 2025
3 TIME 22:42:41
0 @S0001@ SOUR
1 TITL Titre de la source 1
1 AUTH Auteur de la source
1 ABBR Document de la source
1 REPO @R0001@
2 CALN Référence de la source
3 MEDI Numerisation
1 CHAN
2 DATE 18 JUL 2025
3 TIME 22:42:41
0 @R0001@ REPO
1 NAME Archives du Pas-de-Calais (Nom du dépot d’archives)
1 ADDR Adresse du du dépot d’archives
2 ADR1 Adresse du du dépot d’archives
1 PHON Téléphone du du dépot d’archives
1 EMAIL Email du dépot d’archives
1 WWW url du du dépot d’archives
0 TRLR