Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deep Inelastic Scattering of Leptons and Hadrons in the QCD Parton Model
  and Experimental Tests   We present the basic aspects of deep inelastic phenomena in the framework of
the QCD parton model. After recalling briefly the standard kinematics, we
discuss the physical interpretation of unpolarized and polarized structure
functions in terms of parton distributions together with several important sum
rules. We also make a rapid survey of the experimental situation together with
phenomenological tests, in particular concerning various QCD predictions. In
the summary, we try to identify some significant open questions, to clarify
where we stand and to see what we expect to learn in the future.

37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat