attribution.tex

\section{Attribution Layer}\label{sec:attribution}

The attribution layer is meant to represent information about the source of a statement, when this is explicitly mentioned in the text. It consists of {\tt <statement>} elements that contain, at least, the  {\tt <statement\_target>} and, typically, the {\tt <statement\_source>}. If present, the  {\tt <statement\_cue>} can also be represented. All elements contain a span that points to relevant terms in the term layer.

A  {\tt <statement>} has the following subelements:

\begin{itemize}
\item statement\_target (\textbf{required}): provides the span of terms that constitute the statement itself, i.e.\ where the attribution applies to (in the example below \textit{Hilton Hotel Paris was a nightmare}).
\item statement\_source: provides the span that expresses the source of the statement (\textit{They} in the example)
\item statement\_cue: provides the span that explicitly links the statement to the source (\textit{said} in the example, but also expressions such as \textit{according to})
\end{itemize}  

\begin{Verbatim}[fontsize=\small]
<attribution>
  <!-- They said Hilton Hotel Paris was a nightmare. -->
  <statement id="a1">
    <statement_target>
      <span>
        <target id="t3">
        <target id="t4">
        <target id="t5">
        <target id="t6">
        <target id="t7">
      </span>
    </statement_target>
    <statement_source>
      <span>
        <target id="t1">
      </span>
    </statement_source>
    <statement_cue>
      <span>
        <target id="t2">
      </span>
    </statement_cue>
    </statement>
</attribution>
\end{Verbatim}

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