| http://www.w3.org/ns/prov#value | - al I/O, files, and persistent objects ??? Database coverage including MySQL, SQLite, Oracle, DBI, and more ??? Ruby-specific techniques in OOP and dynamic programming ??? Graphical interfaces in Ruby (Tk, GTK+, Fox, and Qt) ??? Working with Ruby threads for lightweight multitasking ??? Everyday scripting and system administration in Ruby ??? Working with image files, PDFs, YAML, XML, RSS, and Atom
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