+
−<p>
+
−  Querying an LTPDA repository is done using standard SQL statements. The repository GUI
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−  presents the user with the possibility to graphically build SQL statements which avoids
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−  learning SQL syntax. Currently, the SQL statements that can be built in this way are 
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−  restricted to queries on a single database table. High-level queries, searching more database tables at once, are implemented in the following panel.
+
−</p>
+
−<p>
+
−  The repository GUI has a query panel which looks like the figure below:
+
−</p>
+
−<br>
+
−<br>
+
−<img src="images/repo_gui_query_1.png" alt="Repo GUI Query">
+
−<br>
+
−<br>
+
−<p>
+
−  In this figure, you see that the user has built a query to select all objects 
+
−  submitted on the 24th February 2008. The results will contain the object id, 
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−  the submitted date, the experiment title, the experiment description, and the analysis
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−  description. The results will be sorted in descending order of the object id.
+
−</p>
+
−<p>
+
−  Executing the query (click the 'Execute query' button) produces the results table
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−  shown below.
+
−</p>
+
−<br>
+
−<br>
+
−<img src="images/repo_gui_query_2.png" alt="Repo GUI Query Results">
+
−<br>
+
−<br>
+
−<p>
+
−  The query string that is actually executed is presented in the text edit
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−  box above the 'Execute query' button. This query string can be edited to allow for finer
+
−  control over the query. This is meant for users who already have a working knowledge of MySQL 
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−  SQL syntax.
+
−</p>
+
−