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- In feature-oriented software development, feature-oriented software development program cubes (FOSD program cubes) are n-dimensional arrays of functions (program transformations) that represent n-dimensional product lines. A program is a composition of features: a base program is augmented with increments in program functionality, called features, to produce a complex program. A software product line (SPL) is a family of related programs. A typical product line has F0 as a base program, and F1..Fn as features that could be added to F0. Different compositions of features yield different programs.Let + denote the feature composition operation. A program P in SPL might have the following expression: P = F8 + F4 + F2 + F1 + F0 That is, P extends program F0 with features F1, F2, F4, and F8 in this order. We can recast P in terms of a projection and contraction of a 1-dimensional array.Let Fi = [F0 .. Fn] denote the array of features used by a product line. A projection of Fi eliminatesunneeded features, yielding a shorter array (call it) Gi. A contraction of Gi sums each Gi in a specific order, to yield a scalar expression. The expression for P becomes: P = Fi where the index values accomplish projection and summation is array contraction. This idea generalizes to n-dimensional arrays that model multi-dimensional product lines. (en)
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- In feature-oriented software development, feature-oriented software development program cubes (FOSD program cubes) are n-dimensional arrays of functions (program transformations) that represent n-dimensional product lines. A program is a composition of features: a base program is augmented with increments in program functionality, called features, to produce a complex program. A software product line (SPL) is a family of related programs. A typical product line has F0 as a base program, and F1..Fn as features that could be added to F0. Different compositions of features yield different programs.Let + denote the feature composition operation. A program P in SPL might have the following expression: (en)
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