hi, During the last phone meeting we touched upon the question of how to represent timestamp-like information in glue2. The corresponding action item was this: "Balazs: to check if UR WG adopt dateType XML Schema type or POSIX timestamp" I did some investigation and found that the UR group of OGF indeed makes use of the xsd:dateTime. (see their spec https://forge.gridforum.org/sf/go/doc14337?nav=1) xsd:dateTime is a "profile" of the ISO 8601, in the sense that it selects the particular [-]CCYY-MM-DDThh:mm:ss[Z|(+|-)hh:mm] "extended format" of the large number of date/time formats defined by the ISO 8601 standard. It also excludes the "basic format". some references: http://books.xmlschemata.org/relaxng/ch19-77049.html http://en.wikipedia.org/wiki/ISO_8601 cheers, Balazs