This is something I've had churning in my mind since I first saw
Type: 'index on a RebSite index: if a Rebol header has a TYPE value, it generally doesn't contain your regular DO code (some do—modules, for instance).
What if when you DO a script that has a TYPE value, it passes it on to a handler for that type? Presumably in the above example, you'd open a Rebsite viewer, or return a block of items in the index.
That's great if your TYPE is already registered, but if you call a script from SHELL:
Then you'd have no way to register a handler. Unless even custom scripts could use a NEEDS header:
Rebol [ Title: "A Book" Type: 'epub Needs: [%epub-dialect-handler.reb] ] some dialect stuff manifest [ * %some.html * %content.html %files.html ]
Shell -> HTML, could be CGI too:
#!/usr/local/bin/ren-c Rebol [ Title: "My Web Page" Type: 'lest Needs: [%lest.reb] ] head title "Hello World!" body h1 either (now/time < 12:00) "Good morning" "Good afternoon" " 🌎🌍🌏."