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Asked: 2026-05-18T22:27:02+00:00

I am trying to implement porter stemming algorithm, but I stumbled at this point

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I am trying to implement porter stemming algorithm, but I stumbled at this point

where the square brackets denote
arbitrary presence of their contents.
Using (VC){m} to denote VC repeated m
times, this may again be written as

[C](VC){m}[V].

m will be called the \measure\ of any
word or word part when represented in
this form. The case m = 0 covers the
null word. Here are some examples:

m=0    TR,  EE,  TREE,  Y,  BY.
m=1    TROUBLE,  OATS,  TREES,  IVY.
m=2    TROUBLES,  PRIVATE,  OATEN,  ORRERY.

I don’t understand what is this “measure” and what does it stand for?

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1 Answer

  1. Editorial Team

    Looks like the measure is the number of times a vowel is immediately followed by a consonant. For example,

    “TROUBLES” has:

    Optional initial consonants [C] = “TR”.

    First vowels-consonants group (VC) = “OUBL”.

    Second vowels-consonants group (VC) = “ES”.

    Optional ending vowels [V] is empty.

    So the measure is two, the number of times (VC) was “matched”.

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