| 摘要 |
Methods and apparatus, including computer systems and program products, for machine-implemented representations of collections of objects. A method includes providing data structure definitions that define a set object to represent the collection of objects; and generating, with a computer-implemented constructor using the one or more data structure definitions, a set object representing the collection of objects. The data structure definitions may define the set object to be a one-dimensional set object including a first list of knot elements, a second list representing the knot elements that the one-dimensional set includes, and a third list representing elements, other than the knot elements, that are included in the one-dimensional set. The data structure definitions may define the set object to be a multi-dimensional set object including set objects, such as one-dimensional set objects or other multi-dimensional set objects, nested within the multi-dimensional set object.
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