SciDAC array definition The root of QCDML The SciDAC array definition Also known as configuration XML. Contains the markovStep The value of the average plaquette on this configuration The Logical file name on the grid of the data file itself The URI of the ensemble to which this configuration belongs Contains information on when and by whom the data was produced as well as possible use conitions Contains information on how the data was produced, i.e. code, machine etc Enumeration of precision types, single(32 bit) or double (64 bit) Management action such as generate data, add to the catalogue, withdraw from the catalogue. generate is the zeroeth revision, as add has to be number 1. One can generate data without submitting to ILDG Who made this revision Contains the management information An enumeration of revision actions generate new configuration add new configuration to ILDG replace configuration metadata or binary remove configuration Contains a name and a value