Every record in ABRA Flexi contains a last modified date attribute (lastUpdate). This allows detecting that a record in ABRA Flexi has been modified. This value is also used by the ABRA Flexi Sync interface to recognize changes.
The attribute is of type datetime, so the value also carries the time and time zone:
<lastUpdate>2026-06-16T16:25:48.830+02:00</lastUpdate>
Filtering by last change
This attribute can also be used for filtering, both with the date alone and with the date and time:
/c/<identifikátor firmy>/adresar/(lastUpdate > '2026-01-01')
/c/<identifikátor firmy>/adresar/(lastUpdate > '2026-01-01T00:00:00')
⚠️ To track changes, it is better to use the dedicated Changes API feature offered by ABRA Flexi. Filtering by lastUpdate will not capture deleted records and is significantly more expensive with larger data volumes.