https://appcoding.com/tags/monitoring/ Recent content in Monitoring on App Coding Hugo en-us Mon, 05 Oct 2026 00:00:00 +0000 https://appcoding.com/verified-absence-is-evidence-a-database-for-recording-that-you-checked-and-nothing-was-there/ Mon, 05 Oct 2026 00:00:00 +0000 https://appcoding.com/verified-absence-is-evidence-a-database-for-recording-that-you-checked-and-nothing-was-there/ <p>An auditor asks you to show that customer 1187 was screened against a sanctions list on March 3. The screening job writes a row when it finds a match, and customer 1187 has no rows. That fits two histories: the job ran and found nothing, or the job never ran. The database can&rsquo;t tell them apart, so you hold no evidence either way.</p> <p>This is the closed-world assumption doing what SQL has always done: a row that doesn&rsquo;t exist is false. RDF and OWL went the other way with an open-world assumption, where a missing statement means unknown. Neither has a place for the sentence you actually want to store: I looked here, in this way, at this time, and found nothing.</p>