Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: WYSIWYE: An Algebra for Expressing Spatial and Textual Rules for Visual
  Information Extraction   The visual layout of a webpage can provide valuable clues for certain types
of Information Extraction (IE) tasks. In traditional rule based IE frameworks,
these layout cues are mapped to rules that operate on the HTML source of the
webpages. In contrast, we have developed a framework in which the rules can be
specified directly at the layout level. This has many advantages, since the
higher level of abstraction leads to simpler extraction rules that are largely
independent of the source code of the page, and, therefore, more robust. It can
also enable specification of new types of rules that are not otherwise
possible. To the best of our knowledge, there is no general framework that
allows declarative specification of information extraction rules based on
spatial layout. Our framework is complementary to traditional text based rules
framework and allows a seamless combination of spatial layout based rules with
traditional text based rules. We describe the algebra that enables such a
system and its efficient implementation using standard relational and text
indexing features of a relational database. We demonstrate the simplicity and
efficiency of this system for a task involving the extraction of software
system requirements from software product pages.

3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas