Give a more extensive intro to chap 4

thesis/4-Edit-Filters.tex

@@ -8,7 +8,13 @@
 
 The extension, or at least its end user facing parts, was later renamed to ``edit filter'' in order to not characterise false positives as ``abuse'' and thus alienate good faith editors striving to improve the encyclopedia~\cite{Wikipedia:EditFilter},~\cite{Wikipedia:EditFilterTalkArchiveNameChange}.
 
-In the present chapter, we aim to understand how edit filters work, who implements and runs them and above all, how and why they were introduced in the first place and what the qualitative difference is between them and other algorithmic quality control mechanisms.
+In this chapter, we aim to understand how edit filters work, who implements and runs them and above all, how and why they were introduced in the first place and what the qualitative difference is between them and other algorithmic quality control mechanisms.
+The analysed data is presented in the following section.
+Section~\ref{sec:4-def} defines what an edit filter is.
+The AbuseFilter MediaWiki extension is introduced in section~\ref{sec:mediawiki-ext}.
+After this common understanding of the state of the art of edit filters has been established, section~\ref{section:4-history} looks back and traces the historical debate that led to the filters' introduction.
+Sections~\ref{sec:filters-internal} and~\ref{sec:filters-external} take respectively an internal (edit filter managers') and an external (all other users') perspective towards the edit filters.
+The findings are then compared with the results from chapter~\ref{chap:background} and discussed in section~\ref{sec:filters-role-qc-system}.
 
 \section{Data}
 
@@ -215,6 +221,8 @@ According to the discussion archives, following types of edits were supposed to
 %************************************************************************
 
 \section{Building a Filter: the Internal Perspective}
+\label{sec:filters-internal}
+
 \subsection{How Is a New Filter Introduced?}
 \label{sec:introduce-a-filter}
 
@@ -342,6 +350,7 @@ and all edits that trigger an edit filter are listed in the Abuse Log~\cite{Wiki
 %************************************************************************
 
 \section{Edit Filters' Role in the Quality Control Ecosystem}
+\label{sec:filters-role-qc-system}
 
 The purpose of the present section is to review what we have learnt so far about edit filters and summarise how they fit in Wikipedia's quality control ecosystem.