WITSML Log - Curve Information. The order of the blocks in the container should match the order specified by direction. A comma delimited list of data values. This essentially represents one row of a table where the curve mnemonics represent the column headings. The first value in the list represents columnIndex=1. The actual data corresponding to the curves defined in the LOGCURVEINFO element. A comma delimited list of data values with one value for each curve on the log (e.g., "xxx,yyy, zzz"). For array curves, the value of the array curve will be a space delimited list of values that are contained within the commas that delimit the value for that curve (e.g., "xxx,aa bb cc,zzz"). This essentially represents one row of a table where the curve mnemonics represent the column headings. The order of the nodes for each block should match the order implied by "direction". A pointer to the block descriptor's uid that this level represents. If more than one block descriptor is specified then this attribute is required.