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The Iliffe vector for a 2-dimensional array is simply a vector of pointers to vectors of data, i.e., the Iliffe vector represents the columns of an array where each column element is a pointer to a row vector.
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Their disadvantages include the need for multiple chained pointer indirections to access an element, and the extra work required to determine the next row in an
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are implemented as Iliffe vectors. Iliffe vectors were used to implement sparse multidimensional arrays in the OLAP product
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John K. Iliffe (1961). "The Use of The Genie System in
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and other kinds of irregularly shaped arrays. The data structure is named after
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Data structure used to implement multi-dimensional arrays
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