<?xml version="1.0" standalone="yes"?>
<Paper uid="W05-1623">
  <Title>Reversibility and Re-usability of Resources in NLG and Natural Language Dialog Systems</Title>
  <Section position="2" start_page="0" end_page="0" type="abstr">
    <SectionTitle>
Abstract
</SectionTitle>
    <Paragraph position="0"> Reversibility is a key to e-cient and maintainable NLG systems. In this paper, we present a formal deflnition of reversible NLG systems and develop a classiflcation of existing natural language dialog systems in this framework.</Paragraph>
  </Section>
class="xml-element"></Paper>