The basic statement we want to express is that

 in some context
 some resource (e.g. a web page, a browser)
  evaluate-to
 some result (e.g. fails to meet a checkpoint, 
                   correctly implements css2 display property)

-----------------------------------------------------------------------------------------

   For the context:
     date (of the evaluation)
     who-claims: PERSON (running the test)
     platform: PLATFORM (on which the test was run)
    
   For the resource being evaluated we mostly want to have
     unique id: URL
       e.g.  http://example.org/page#img[3]
             http://foo.com/svgplayer1.23
     nature of resource: ENUM [web-content, tool]
     optionally: 
       a version number
       a date (date the resource was last modified, released)
       a snapshot: URL (copy of resource at the time it was evaluated)
   
   For the result, we want to have 
     value: ENUM [pass, fail, not-tested, not-applicable, cant-tell]
     confidence: ENUM [high, medium, low]  
     comments: string 
     test-case: TESTCASE 
     
   then we have some compound subtypes:
     PERSON: regular stuff: NAME, EMAIL, URL
     PLATFORM: TOOL, OS, CCPP-SETTING
     TESTCASE: this one deserves more details, it could come from a
               separated test framework/harness formalism, used  
               to build the test itself
         suite: URL (w3.org/tr/wcag10, w3.org/style/css/test)
         individual id: URL, (checkpoint id, svg test suite assertion)
         mode: ENUM [manual, auto, heuristic]
         purpose: STRING
         expected result: STRING (to be compared with result comments above)
         operator-instructions: STRING
         reproducable step: STRING
   
   ------------------------------------------------------------------------------------------
   
   Three examples:
   
   
   1) a web page fails a couple of wcag checkpoints
    
   on 2001/03/14, danield@w3.org, using linux, netscape 4.75 says that:
   
    web-content at http://example.org/page#img[3] 
      last modified on 2001/01/01
      a snapshot of which was saved at http://store.com/example.org/page#img[3]
    fails
      with a high confidence 
      comments: alt text provided is just filename
    http://w3.org/tr/wcag#cp1.1, 
      according to the test suite provided www.cast.org/bobby
      manual check
      expected result: presence of alt text describing function
   
   and that:
   
    web-content at http://example.org/page#name
      last modified on 2001/01/01
      a snapshot of which was saved at http://store.com/example.org/page#name
    fails
      with a medium confidence 
      comments: use a font instead of h3
    http://w3.org/tr/wcag#cp2.1, 
      according to the test suite provided www.cast.org/bobby
      manual check
      expected result: use proper structure instead of style
    
   
   2) an svg viewer correctly implements circle filling, rect filling, etc
   
   on 2001/03/14, joe@zzz.com says that
   
    the tool identified by http://foo.com/svgplayer1
      version 1.23
      released 2000/12/24
    passes 
      with a medium confidence 
      comments: circle looks ok, but there's an extra pixel there
    http://w3.org/tr/svg/ts/assertion1, 
     part of http://w3.org/svg/testsuite1.0 
     manual check
     purpose: testing circle filling
     expected result: circle should be all red, with a black border 
   
   and that
   
    the same tool (pointer to resource described above)
    passes 
      with a high confidence 
      comments: rect looks just fine
    http://w3.org/tr/svg/ts/assertion2, 
     part of http://w3.org/svg/testsuite1.0 
     manual check
     purpose: testing rect filling
     expected result: rect should be all red, with a white border 
   
   
   3) a web page has an HTML syntax error
   
   on 2001/03/14 sean@w3.uk, says that:
    web-content at http://example.org/page
    fails
      comments: syntax error, line12, missing ul
    http://w3.org/html4/testassertion123
    according to http://validator.w3.org/html
    auto mode 
    purpose: checking html4 dtd content model
    expected result: see w3.org/tr/html4#ul
   
   ---------------------------------------------------------------------------------------------
   
   <rdf:RDF xmlns="http://www.w3.org/2000/10/swap/log.n3#"
       xmlns:earl="http://www.w3.org/2001/03/earl/#"
       xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
       xmlns:myns="http://myns.org/#"
       xmlns:dc="http://purl.org/dc/elements/1.1/"
       xmlns:rdfs="http://www.w3.org/2001/01/rdf-schema#">
   
       <rdf:Description about="http://myns.org/#a">
           <equivalentTo xmlns="http://www.daml.org/2000/10/daml-ont#"
               parseType="Quote">
               <earl:tool about="http://foo.com/svgplayer1">
                   <myns:released parseType="Resource">
                       <dc:date>2000/12/24</dc:date>
                   </myns:released>
                   <earl:version>1.23</earl:version>
               </earl:tool>
           </equivalentTo>
       </rdf:Description>
   
       <rdf:Description about="mailto:joe@zzz.com">
           <earl:asserts parseType="Quote">
               <rdf:Description about="http://myns.org/#a">
                   <rdfs:comment> circle looks ok, but there's an extra pixel there
                       http://w3.org/tr/svg/ts/assertion1,
                       part of http://w3.org/svg/testsuite1.0 
                  </rdfs:comment>
                   <earl:expectedResult>circle should be all red, with a black border
                    </earl:expectedResult>
                   <earl:testMode>manual</earl:testMode>
                   <earl:testPurpose>testing circle filling</earl:testPurpose>
                   <earl:testResult parseType="Resource">
                       <earl:validity
                               resource="http://www.w3.org/2001/03/earl/#passes"/>
                       <earl:confidence>medium</earl:confidence>
                   </earl:testResult>
               </rdf:Description>
           </earl:asserts>
       </rdf:Description>
   
       <rdf:Description about="mailto:joe@zzz.com">
           <earl:asserts parseType="Quote">
               <rdf:Description about="http://myns.org/#a">
                   <rdfs:comment> rect looks just fine
                         http://w3.org/tr/svg/ts/assertion2,
                         part of http://w3.org/svg/testsuite1.0  
                   </rdfs:comment>
                   <earl:expectedResult>rect should be all red, with a white border
                   </earl:expectedResult>
                   <earl:purpose>testing rect filling</earl:purpose>
                   <earl:testMode>manual</earl:testMode>
                   <earl:testResult parseType="Resource">
                       <earl:validity  resource="http://www.w3.org/2001/03/earl/#passes"/>
                       <earl:confidence>high</earl:confidence>
                   </earl:testResult>
               </rdf:Description>
           </earl:asserts>
       </rdf:Description>
   
       <rdf:Description about="mailto:joe@zzz.com">
           <earl:when parseType="Resource">
               <dc:date>2001/03/14</dc:date>
           </earl:when>
       </rdf:Description>
   </rdf:RDF>