To make a URI into a Clojure keyword namespace, we may simply replace the 11 URI characters that are forbidden or problematic in keywords with Unicode-alphabetic characters outside Latin-1.
The substitutes should be present in common desktop fonts, and should not be mistaken for Latin-1 characters. They should come from a single Unicode script, to avoid burdensome Unicode puns. It should be a raster script that does not require decades of handwriting practice. Cyrillic fits the bill very well: it's recognizable and out-of-band. You'd never type these URI keywords in, but Cyrillic is a software-selectable keyboard so you could if you felt like it. http://www.cs.yale.edu/~perlis-alan/quotes.html httpцЛЛwwwЯcsЯyaleЯeduЛжperlis-alanЛquotesЯhtml Here is a demonstration of a simple URI <-> keyword translator and a keyword-namespace aliasing macro to facilitate relatively painless use of namespace literals in source code. (To furthermore overcome the problem that "%" hex expressions compare case-blind in URIs, but not keywords, we should norm %xx to %XX as RFC 3986 recommends before converting to a keyword namespace.) (def problems [\. \~ \: \/ \[ \] \@ \( \) \, \;]) (def solutions [\Я \ж \ц \Л \П \Ю \Ж \ъ \Ъ \г \д]) (defn- tr [a b] (let [m (zipmap a b)] (fn [s] (apply str (map #(m % %) s))))) (def uri->kwns (tr problems solutions)) (def kwns->uri (tr solutions problems)) (defmacro alias-xml-ns [sym uri] `(let [kwns# (symbol (uri->kwns ~uri))] (create-ns kwns#) (alias ~sym kwns#))) (comment (uri->kwns "http://www.w3.org/2000/01/rdf-schema#";) (kwns->uri *1) (alias-xml-ns 'html "http://www.w3.org/1999/xhtml";) (assert (identical? ::html/aside :httpцЛЛwwwЯw3ЯorgЛ1999Лxhtml/aside)) ) -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
