Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: XML Query Processing and Query Languges: A Survey   Today's database is associated with interoperability between different
domains and applications. This consequently results in the importance of data
portability in database. XML format fits the requirements and it has been
increasingly used for serving applications across different domains and
purposes. However, querying XML document effectively and efficiently is still a
challenging issue. This paper discusses query processing issues on XML and
reviews proposed solutions for querying XML databases by various authors.

0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio