Initial checkin.

Signed-off-by: Thomas Hochstein <thh@inter.net>

README.md

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+# nanoc extensions
+
+*[nanoc](http://nanoc.ws/)* is a popular *static site generator*.
+
+I'll add some little extensions for *nanoc<* here.
+
+## filters
+
+### abbreviations.rb
+
+Simple *nanoc* filter to add `<abbr>` tags.
+
+After reading a YAML document from `/content/_data/abbreviations.yam`,
+all occurences of each $abbrev are replaced by a
+`<abbr title="$abbrev">$fulltext</abbr>` construct.
+
+The filter currently uses a very naive - and time consuming - regexp approach.
+
+The abbreviations dictionay in `/content/_data/abbreviations.yaml` has to
+look like this:
+
+    ---
+	  abbreviations:
+	  - abbrev: HTML
+      fulltext: HyperText Markup Language
+
+You'll need a (compile and) routing rule to stop the `abbreviations.yaml`
+from being rendered and compiled, i.e. like this:
+
+    # ignore everything starting with _
+    compile %r{/_} do
+      nil
+    end
+    route %r{/_} do
+      nil
+    end