content: minor refinement of landing page blurbs

Author: alee

content/en/_index.html

@@ -19,19 +19,22 @@ <h3 class="font-weight-light text-center">
 {{< blocks/section color="dark" >}}
   <div class="col-12 text-center mb-5"><h2><b>Standards</b></h2></div>
   {{% blocks/standard icon="fas fa-search" title="Accessibility" url="/standards/accessibility" %}}
-  Enabling discovery and access for model code, documentation, and metadata.
+  Support best practices for discovery and access to model code, documentation, and metadata.
   {{% /blocks/standard %}}
 
   {{% blocks/standard icon="fas fa-book" title="Documentation" url="/standards/documentation" %}}
-  Promoting documentation needed for others to understand a model and reproduce its results.
+  Help others understand a model, replicate its results, reuse or extend it with a combination of narrative
+  documentation protocols and visual diagrams that clearly and comprehensively describe the model, how it works, its
+  assumptions and limitations, etc.
   {{% /blocks/standard %}}
 
   {{% blocks/standard icon="fas fa-circle-nodes" title="Interoperability" url="/standards/interoperability" %}}
-  Allowing models to be integrated into multi-component modeling environments.
+  Enable models to be composed or integrated into larger scale models while maintaining scientific rigor.
   {{% /blocks/standard %}}
 
   {{% blocks/standard icon="fas fa-recycle" title="Reusability" url="/standards/reusability" %}}
-  Facilitate reuse of model code for verification and reproducability by future researchers.
+  Facilitate reuse of high quality model code for reproducibility, replication, extension, and integration into larger
+  scale models.
   {{% /blocks/standard %}}
 {{< /blocks/section >}}