[Db-derby Wiki] Update of "HowItWorks" by DanDebrunner

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The following page has been changed by DanDebrunner:
http://wiki.apache.org/db-derby/HowItWorks

New page:
= How Derby Works =
<!> Work in progress <!>
== Where to Look ==
Information on Derby's internals is scattered over a number of locations:
 1. The [http://db.apache.org/derby/derby_downloads.html#Derby+source+code code], describes exactly how it works. B)
 1. Comments in the code, usually match the code, and hopefully will add value as to why the code is as it is, rather than just describing the code exactly. The complete [http://db.apache.org/derby/javadoc/engine/ javadoc of all the classes, methods & fields] is generated nightly. If more comments could be added then please submit a patch.
 1. Discussions in the [http://mail-archives.eu.apache.org/mod_mbox/db-derby-dev mail list archives for derby-dev] at db.apache.org.
 1. [http://db.apache.org/derby/papers/index.html Papers and presentations] on web site.
 1. Functional and design specs attached to Jira issues, encouraged when a feature is implemented.
 1. Wiki, please add as much information as you can.

The page attempts to provides links to all the information about how Derby works.

== General ==

== JDBC ==
== Network Server ==
== SQL ==
 * [:SystemTables:System table or catalogs]
== Store ==
 || [http://db.apache.org/derby/papers/btree_package.html BTree+ implementation] || [http://db.apache.org/derby/papers/pageformats.html On-disk page format] | [http://db.apache.org/derby/papers/logformats.html Transaction log format] ||