{"id":629,"date":"2009-08-18T22:58:10","date_gmt":"2009-08-19T05:58:10","guid":{"rendered":"https:\/\/dubinko.info\/blog\/?p=629"},"modified":"2009-08-18T23:05:21","modified_gmt":"2009-08-19T06:05:21","slug":"geek-thoughts-reading-xproc-code","status":"publish","type":"post","link":"https:\/\/dubinko.info\/blog\/2009\/08\/geek-thoughts-reading-xproc-code\/","title":{"rendered":"Geek Thoughts: reading XProc code"},"content":{"rendered":"

All the input\/output\/port stuff in XProc<\/a> seemed incomprehensible to me until I recognized something simple. Every time you see a <pipe> element, read it as “comes from”. For example<\/p>\n

\r\n
  <p:output port=\"result\">\r\n    <p:pipe step=\"validated\" port=\"result\"\/>\r\n  <\/p:output><\/pre>\n
reads as ‘output to the “result” port comes from the port “result” on step “validated”‘ and<\/p>\n
  <p:input port=\"source\">\r\n    <p:pipe step=\"included\" port=\"result\"\/>\r\n  <\/p:input><\/pre>\n
reads as ‘input for the “source” port comes from the port “result” on step “included”‘. If you keep this in mind it all makes much more sense.<\/p>\n
More collected Geek Thoughts at http:\/\/geekthoughts<\/a>.info.<\/p>\n","protected":false},"excerpt":{"rendered":"
All the input\/output\/port stuff in XProc seemed incomprehensible to me until I recognized something simple. Every time you see a <pipe> element, read it as “comes from”. For example <p:output port=”result”> <p:pipe step=”validated” port=”result”\/> <\/p:output> reads as ‘output to the “result” port comes from the port “result” on step “validated”‘ and <p:input port=”source”> <p:pipe step=”included”…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[284,9,4],"tags":[1179,844,839,1156,202,1153,717],"class_list":["post-629","post","type-post","status-publish","format-standard","hentry","category-geekthoughts","category-standards","category-xml","tag-geekthoughts","tag-pipeline","tag-processing","tag-standards","tag-w3c","tag-xml","tag-xproc"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t