The Virtual Observatory Quantity Data Model
(VOQDM) package is a "thing"-based data model for
use with scientific and mathematical data in the
International Virtual Observatory (IVO). It is
built upon the QML (Quantity Model Language)
package and, in general terms, enables fast,
convenient
serialization/deserialization/manipulation of
Quantity-based objects and documents. An important
specific application for this package is to enable
the I/O of VO-catalog-based data.
