Descriptor of a curve associated with a block. This captures the representational aspects of the curve. The data semantics is defined by logCurveInfo. A pointer to the curveInfo's curveId that this curve represents. A 1-based index of curve data in the data records. A value of zero indicates an implied curve with no values in the data record. The minimum index value at which the first valid data point is located. This value will be properly set by the server to reflect data in the returned document. The maximum index value at which the last valid data point is located. This value will be properly set by the server to reflect data in the returned document. The minimum index value at which the first valid data point is located. This value will be properly set by the server to reflect data in the returned document. The maximum index value at which the last valid data point is located. This value will be properly set by the server to reflect data in the returned document. Unique identifier for the curve information.