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Error message

  • Deprecated function: Array and string offset access syntax with curly braces is deprecated in include_once() (line 3473 of /is/htdocs/wp1148320_ISA6Q7ZC2Y/drupal7/includes/
  • Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in book_prev() (line 775 of /is/htdocs/wp1148320_ISA6Q7ZC2Y/drupal7/modules/book/book.module).

The glossary has some background on important terms and concepts. There is a lot of information scattered across the web, and there is, of course Wikipedia which has detailed information on some topics. 

Here we want to present a coherent view on diverging topics.