Would using "in which" be grammatically correct here?

ABC presents an approach for object recognition using shape knowledge in which a set of attributes describing the object shape and their spatial context are introduced in order to classify objects.

  • yes, it is correct
    – Kevin
    Apr 29 '13 at 14:27
  • @Kevin: that mean no any grammatical errors of that sentence?
    – gnp
    Apr 29 '13 at 16:03
  • 2
    The error I see would be the conjugation of "are" with respect to "set".
    – Kevin
    Apr 29 '13 at 18:32
  • @Kevin: thank you. that mean 'a set of attributes" should be singular?
    – gnp
    Apr 29 '13 at 20:13
  • 1
    "of attributes" is a prepositional phrase describing "set". It does not change it from singular to plural. So yes, "a set of attributes" is still singular.
    – Kevin
    May 2 '13 at 18:22

Whether in which is correct depends on what the sentence means, which is not very clear.

What does the relative clause modify? Is it
* An approach to [not for] object recognition, or
* shape knowledge?

If it modifies approach, then in which a set of attributes ... are introduced might be paraphrased:

In [the course of developing/describing] this approach ... I introduce a [new] set of attributes.

That would be reasonably idiomatic. But if it modifies shape knowledge, introduce would imply something you are adding to existing 'shape knowledge', and you should use a different idiom:

... shape knowledge into which I introduce a [new] set of attributes.

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