Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cooperative Update Exchange in the Youtopia System   Youtopia is a platform for collaborative management and integration of
relational data. At the heart of Youtopia is an update exchange abstraction:
changes to the data propagate through the system to satisfy user-specified
mappings. We present a novel change propagation model that combines a
deterministic chase with human intervention. The process is fundamentally
cooperative and gives users significant control over how mappings are repaired.
An additional advantage of our model is that mapping cycles can be permitted
without compromising correctness.
  We investigate potential harmful interference between updates in our model;
we introduce two appropriate notions of serializability that avoid such
interference if enforced. The first is very general and related to classical
final-state serializability; the second is more restrictive but highly
practical and related to conflict-serializability. We present an algorithm to
enforce the latter notion. Our algorithm is an optimistic one, and as such may
sometimes require updates to be aborted. We develop techniques for reducing the
number of aborts and we test these experimentally.

6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ