-At the top level, we have one table for each of the XML document types
-that we import. For example, the documents corresponding to
-\fInewsxml.dtd\fR will have a table called \(dqnews\(dq. All top-level
-tables contain two important fields, \(dqxml_file_id\(dq and
-\(dqtime_stamp\(dq. The former is unique and prevents us from
-inserting the same data twice. The time stamp on the other hand lets
-us know when the data is old and can be removed. The database schema
-make it possible to delete only the outdated top-level records; all
-transient children should be removed by triggers.
+At the top level (with two notable exceptions), we have one table for
+each of the XML document types that we import. For example, the
+documents corresponding to \fInewsxml.dtd\fR will have a table called
+\(dqnews\(dq. All top-level tables contain two important fields,
+\(dqxml_file_id\(dq and \(dqtime_stamp\(dq. The former is unique and
+prevents us from inserting the same data twice. The time stamp on the
+other hand lets us know when the data is old and can be removed. The
+database schema make it possible to delete only the outdated top-level
+records; all transient children should be removed by triggers.