Hi Klwong,
Using the HTTP interface, you should be able to get the last modified timestamp by performing an Http GET. Note that this can only be done on a per instance basis. In other words you cannot get a cursor (say of 5 instances) and then iterate over them for the timestamp. You must request the timestamp at instance retrieval.
Within the Tamino API for Java there is a method call which will return the last modified timestamp but I cannot remember what it is called.
I hope that I have interpreted your question correctly.
Kind regards,
Simon
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