# XHTML 1.0 Subset Schema
# Author: Sean B. Palmer, inamidst.com
# Check: rnv -c proj/quality/xhtml.rnc
# A provisional means of validating XHTML files
# easily using a RELAX NG validator such as rnv.

default namespace html = "http://www.w3.org/1999/xhtml"

# Common Attributes

Core.attrs = 
   attribute id { xsd:ID }?,
   attribute class { text }?,
   attribute style { text }?, 
   attribute title { text }?

I18n.attrs = 
   attribute xml:lang { text }?,
   attribute dir { "ltr" | "rtl" }?

Main.attrs = 
   Core.attrs, I18n.attrs, 
   attribute onclick { text }?

# Content Models

BlockMinusForm = 
   (address | blockquote | del | div.elem | dl | h1 | h2 | 
    h3 | hr | ins | ol | p | pre | script | table | ul)*
Block = (BlockMinusForm | form)*

InlineMinusMedia = 
   (a | abbr | br | cite | code | del | em | input | ins | 
    label | script | span | strong | sub | sup | textarea | text)*
Inline = (InlineMinusMedia | img | object)*

Flow = (Block | Inline)*

# Elements

start = html

html = element html { 
   I18n.attrs, 
   head, body
}

head = element head { 
   I18n.attrs, 
   attribute profile { text }?, 
   title, base?, (script* & style* & meta* & link*)
}

title = element title { 
   I18n.attrs, 
   text
}

base = element base { 
   attribute href { text }, 
   empty
}

meta = element meta { 
   I18n.attrs, 
   attribute content { text }?, 
   attribute name { text }?, 
   empty
}

link = element link { 
   Main.attrs, 
   attribute href { text }?, 
   attribute rel { text }?, 
   attribute type { text }?, 
   empty
}

style = element style { 
   I18n.attrs, 
   attribute type { text }, 
   attribute title { text }?, 
   text
}

script = element script { 
   attribute type { text }, 
   attribute src { text }?, 
   text
}

body = element body { 
   Main.attrs, 
   attribute onload { text }?, 
   Block
}

div.elem = element div { 
   Main.attrs, 
   Flow
}

p = element p { 
   Main.attrs, 
   Inline
}

h1 = element h1 { 
   Main.attrs, 
   Inline
}

h2 = element h2 { 
   Main.attrs, 
   Inline
}

h3 = element h3 { 
   Main.attrs, 
   Inline
}

ul = element ul { 
   Main.attrs, 
   li+
}

ol = element ol {
   Main.attrs, 
   li+
}

li = element li {
   Main.attrs, 
   Flow
}

dl = element dl { 
   Main.attrs, 
   (dt, dd+)+
}

dt = element dt { 
   Main.attrs, 
   Inline
}

dd = element dd { 
   Main.attrs, 
   Flow
}

address = element address { 
   Main.attrs, 
   Inline
}

hr = element hr { 
   Main.attrs, 
   empty
}

pre = element pre { 
   Main.attrs, 
   InlineMinusMedia
}

blockquote = element blockquote { 
   Main.attrs, 
   attribute cite { text }?, 
   Block
}

ins = element ins { 
   Main.attrs, 
   attribute cite { text }?, 
   Flow
}

del = element del { 
   Main.attrs, 
   attribute cite { text }?, 
   Flow
}

a = element a { 
   Main.attrs, 
   attribute href { text }?, 
   attribute rel { text }?, 
   (text & img* & span*)
}

span = element span { 
   Main.attrs, 
   Inline
}

br = element br { 
   Core.attrs, 
   empty
}

em = element em { 
   Main.attrs, 
   Inline
}

strong = element strong { 
   Main.attrs, 
   Inline
}

code = element code { 
   Main.attrs, 
   Inline
}

cite = element cite { 
   Main.attrs, 
   Inline
}

abbr = element abbr { 
   Main.attrs, 
   Inline
}

sub = element sub { 
   Main.attrs, 
   Inline
}

sup = element sup { 
   Main.attrs, 
   Inline
}

object = element object { 
   Main.attrs, 
   attribute data { text }?, 
   attribute type { text }?, 
   Flow
}

img = element img { 
   Main.attrs, 
   attribute alt { text }, 
   attribute src { text }, 
   attribute height { text }?, 
   attribute width { text }?, 
   empty
}

form = element form { 
   Main.attrs, 
   attribute action { text }, 
   attribute method { text }?, 
   BlockMinusForm
}

label = element label { 
   Main.attrs
}

input = element input { 
   Main.attrs, 
   attribute type { "text" | "submit" | "hidden" }, 
   attribute name { text }?, 
   attribute size { text }?, 
   attribute value { text }?, 
   empty
}

textarea = element textarea { 
   Main.attrs, 
   attribute cols { text }, 
   attribute rows { text }, 
   attribute name { text }?, 
   text
}

table = element table { 
   Main.attrs, 
   caption?, tr+
}

caption = element caption { 
   Main.attrs, 
   Inline
}

tr = element tr { 
   Main.attrs, 
   (th | td)+
}

th = element th { 
   Main.attrs, 
   Flow
}

td = element td { 
   Main.attrs, 
   Flow
}

# [EOF]