Fixing tag line

Author: phochste

index.bs

@@ -4,7 +4,7 @@ Level: 1
 Status: LD
 Editor: Patrick Hochstenbach, [KNoWS](https://knows.idlab.ugent.be/team/), [email protected] 
 Editor: Jos De Roo, [KNoWS](https://knows.idlab.ugent.be/team/), [email protected] 
-Abstract: This document specifies a Notation3 sublanguage to express RDF Surfaces.
+Abstract: This document specifies a Notation3 sublanguage to express RDF Surfaces: RDF with first-order logic semantics.
 Markup Shorthands: markdown yes 
 Logo: images/logo.svg
 Boilerplate: 

index.html

@@ -2060,7 +2060,7 @@ <h2 class="no-num no-toc no-ref heading settled" id="profile-and-date"><span cla
   </div>
   <div class="p-summary" data-fill-with="abstract">
    <h2 class="no-num no-toc no-ref heading settled" id="abstract"><span class="content">Abstract</span></h2>
-   <p>This document specifies a Notation3 sublanguage to express RDF Surfaces.</p>
+   <p>This document specifies a Notation3 sublanguage to express RDF Surfaces: RDF with first-order logic semantics.</p>
   </div>
   <div data-fill-with="at-risk"></div>
   <nav data-fill-with="table-of-contents" id="toc">