The Open Zaakbrug could perform a query to the database, instead of using the correct and nice zgw communications.
This means that the xml is created with the output of the sql below.
SELECT
DOSSIER.DOSSIER_ID,
DOSSIER.DOSSIER_OMS,
DOSSIER.DAT_AAN,
DOSSIER.GEBR_AAN,
DOSSIER.GEBR_BEW,
DOSSIER.U##SDOSS_ID,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'CMISNAME') AS CMISNAME,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'CMISTYPD') AS CMISTYPD,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'PATHDOS') AS PATHDOS,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'REPIDFOL') AS REPIDFOL,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'ZKBASTYP') AS ZKBASTYP,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'ZKNR') AS ZKNR,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'ZKZAKBO') AS ZKZAKBO,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'ZKZAKURL') AS ZKZAKURL,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = DOSSIER.DOSSIER_ID AND U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'ZKZKZTPU') AS ZKZKZTPU,
poststuk.poststuk_id,
poststuk.onderwerp,
poststuk.DAT_AAN,
poststuk.DAT_BEW,
poststuk.GEBR_AAN,
poststuk.GEBR_BEW,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'CMISTYPS') AS CMISTYPS,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'REPIDDOC') AS REPIDDOC,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKAUTEUR') AS ZKAUTEUR,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKBATYPE') AS ZKBATYPE,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKBESTNM') AS ZKBESTNM,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKBGREG') AS ZKBGREG,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKBRNORG') AS ZKBRNORG,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKDOCCR') AS ZKDOCCR,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKDOCFOR') AS ZKDOCFOR,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKDOCID') AS ZKDOCID,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKDOCTIT') AS ZKDOCTIT,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKDOCUID') AS ZKDOCUID,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKDOCVER') AS ZKDOCVER,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKIGR') AS ZKIGR,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKIOBJTP') AS ZKIOBJTP,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKLATVER') AS ZKLATVER,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKLMVER') AS ZKLMVER,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKMAJVER') AS ZKMAJVER,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKTAAL') AS ZKTAAL,
(SELECT waarde FROM CORSA_PROD.OBJ_KENM WHERE OBJ_KENM.U##OBJECT_ID = poststuk.poststuk_id AND U##OBJECT_TYPE = 'S' AND U##kenmerk_ID = 'ZKVERT') AS ZKVERT
FROM CORSA_PROD.DOSSIER
JOIN CORSA_PROD.STUK_DOSS
ON STUK_DOSS.U##DOSSIER_ID = DOSSIER.DOSSIER_ID
JOIN corsa_prod.poststuk poststuk
ON poststuk.U##SOORT_ID = 'ZGWDOCS'
AND poststuk.U##POSTSTUK_ID = STUK_DOSS.U##POSTSTUK_ID
WHERE DOSSIER.U##SDOSS_ID = 'ZGWZKDOS'
AND DOSSIER.U##DOSSIER_ID = (SELECT U##OBJECT_ID FROM CORSA_PROD.OBJ_KENM WHERE U##OBJECT_TYPE = 'D' AND U##kenmerk_ID = 'ZKZAKURL' AND U##WAARDE = UPPER('https://oz.prod/zaken/api/v1/zaken/4c822916-dacc-4158-ab47-a6a75f41810e'))
The Open Zaakbrug could perform a query to the database, instead of using the correct and nice zgw communications. This means that the xml is created with the output of the sql below.