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= Analysis =

== Overview ==
 This task is about persisting immutables. Generally the idea is that in Sophie 2 we have immutables and ProObjects/Properties and they have to be persisted. The goal of this task is to provide a concept for persisting the immutables.
  * Immutables are not dependent on anything else.
  * Their persistence is quite trivial and currently supported by the formats. These include the backgrounds, titles, sizes etc.

== Task requirements ==
 * Review persisting in the following modules:
  * => [source:trunk/sophie2-platform/modules/org.sophie2.base.persistence]
  * => [source:trunk/sophie2-platform/modules/org.sophie2.main.model.book.format.r1/src/main/java/org/sophie2/main/model/book/format/r1]
  * => [source:trunk/sophie2-platform/modules/org.sophie2.main.model.book.format.r2/src/main/java/org/sophie2/main/model/book/format/r2]
 * Describe the things used for immutables.
  * formats.
  * XML tags.
  * diagram of the format.
  * etc.
 * Add the new things that are to be persisted like:
  * margins
  * paddings
  * etc. (think of the other things after carefully examining the model.) 
 * Explain how listed immutables should be persisted with the listed tools
  * Provide a few examples
  * Accent on the usage of SharedLoader and SharedSaver
 * Provide diagrams of the format that includes the tags for the persisted things.
 * Create integration test for new persisted immutables.
 * All important wiki content should be put in the corresponding section of a wiki page => [wiki:BASE_PERSISTENCE]

== Task result ==
 * wiki page
 * source code

== Implementation idea ==
 * review code
 * add new XML tags
 * add the new immutables to the format

== Related ==
 * [wiki:BASE_PERSISTENCE_COMMONS_R0]
 * [wiki:BASE_PERSISTENCE_INTERMEDIATE_STORAGE_R0]
 * [wiki:BASE_PERSISTENCE_FORMAT_REGISTRY_R0]
 * [wiki:BASE_PERSISTENCE_PROPERTY_FORMAT_R0]
 * [wiki:BASE_PERSISTENCE_FORMAT_POINT_R0]

== How to demo ==
 * show the wiki page.
 * run tests.

= Design =
^(Describe your design here.)^

= Implementation =
^(Describe and link the implementation results here (from the wiki or the repository).)^

= Testing =
^(Place the testing results here.)^

= Comments =
^(Write comments for this or later revisions here.)