Rename "atomic" to "basic RDF term" (#226)

* Rename "atomic" to "basic RDF term"

and reference from basic conformance section.

* Apply suggestions from code review

Co-authored-by: Andy Seaborne <[email protected]>

* Apply suggestions from code review

Co-authored-by: Ted Thibodeau Jr <[email protected]>

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Co-authored-by: Andy Seaborne <[email protected]>
Co-authored-by: Ted Thibodeau Jr <[email protected]>

Author: 3 people

spec/index.html

@@ -613,8 +613,9 @@ <h3>RDF Version Announcement</h3>
       with <a>triples</a> that contain <a>triple terms</a>.
       </li>
     <li><dfn id="dfn-basic" class="export" data-local-lt="basic">Basic conformance</dfn>
-      only supports <a data-lt="RDF graph">graphs</a> or <a data-lt="RDF dataset">datasets</a>
-      with <a>triples</a> that do not contain <a>triple terms</a>.</li>
+      only supports <a data-lt="RDF graph">graphs</a> and/or <a data-lt="RDF dataset">datasets</a>
+      with <a>triples</a> that only contain <a>basic RDF terms</a> &mdash; i.e.,
+      they do not contain <a>triple terms</a>.</li>
   </ul>
   <p class="ednote">The conformance levels described above are tentative,
     and still the subject of group discussion. An alternative to conformance
@@ -788,7 +789,7 @@ <h3>RDF Terms</h3>
       <span id="dfn-rdf-terms"><!-- obsolete term--></span><dfn class="export" data-lt="rdf term">RDF terms</dfn>.</p>
 
     <p>
-      [=IRIs=], [=literals=] and [=blank nodes=] are said to be <dfn class="export" data-lt-no-plural>atomic</dfn> [=RDF terms=].
+      [=IRIs=], [=literals=] and [=blank nodes=] are said to be <dfn data-lt="basic rdf term">basic RDF terms</dfn>.
     </p>
 
     <p><dfn class="export">RDF term equality</dfn>: