Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Charm-Strange Contribution to Charged-Current DIS Structure
  Functions   We review the present theoretical knowledge of the charm--strange
contribution to charged--current DIS structure functions. In particular, the
uncertainties arising from the choice of the factorization scale, of the
massive QCD scheme, and of the parton fit are discussed.

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The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org