When calling save() on subject session, lists (and possibly sets) that have not been modified will be completely removed then added. E.g.

Sample test: creates a thing with a single list property then saves it. Performs no changes, then saves it again. Note that the subject on the Seq has changed – this reflects the fact that the entire collection was removed, recreated then re-added. (N.B. this is happening roughly at line 225 in SubjectSession)

@Test
public void testTUPXXX() throws Exception

{ MemoryContext mc = new MemoryContext(); ThingSession thingSession = new ThingSession(mc); Resource subject = Resource.uriRef("urn:/my/thing/subject"); Resource predicate = Resource.uriRef("urn:/my/thing/predicate"); List<Integer> testInts = new LinkedList<Integer>(); testInts.addAll(Arrays.asList(2, 4, 6, 8)); Thing thing = thingSession.fetchThing(subject); thing.setValues(predicate, testInts); thingSession.save(); RdfXml.write(mc.getTriples(), System.out); thingSession.save(); RdfXml.write(mc.getTriples(), System.out); }