Clarify what _base IRI_ to set in compact() and flatten().

Fixes #396.

Author: gkellogg

index.html

@@ -5720,7 +5720,7 @@ <h3>Algorithm</h3>
             passing a new empty <a>context</a> as <var>active context</var>
             <var>context</var> as <var>local context</var>,
             and <var>context base</var> as <var>base URL</var>.</li>
-          <li>Initialize <a>base IRI</a> to the {{JsonLdOptions/base}} option from <a data-lt="jsonldprocessor-compact-options">options</a>, if set;
+          <li>Set <a data-lt="context-base-iri">base IRI</a> in <var>active context</var> to the {{JsonLdOptions/base}} option from <a data-lt="jsonldprocessor-compact-options">options</a>, if set;
             otherwise, if the <a data-link-for="JsonLdOptions">compactToRelative</a> option is <strong>true</strong>,
             to the IRI of the currently being processed document, if available;
             otherwise to <code>null</code>.</li>
@@ -5874,11 +5874,6 @@ <h3>Algorithm</h3>
             for <a data-lt="jsonldprocessor-expand-input">input</a>,
             and <a data-lt="jsonldprocessor-flatten-options">options</a>
             <span class="changed">with {{JsonLdOptions/ordered}} set to <code>false</code></span>.</li>
-          <li class="changed">Initialize the <a>base IRI</a> to the {{JsonLdOptions/base}} option
-            from <a data-lt="jsonldprocessor-flatten-options">options</a>, if set;
-            otherwise, if the <a data-link-for="JsonLdOptions">compactToRelative</a> option is <strong>true</strong>,
-            to the IRI of the currently being processed document, if available;
-            otherwise to <code>null</code>.</li>
           <li>Initialize an empty <var>identifier map</var>.</li>
           <li>Set <var>flattened output</var> to the result of using the <a href="#flattening-algorithm">Flattening algorithm</a>,
             passing <var>expanded input</var> as <var>element</var>,
@@ -5890,7 +5885,12 @@ <h3>Algorithm</h3>
                 using the <a data-link-for="JsonLdProcessor">compact()</a> method
                 using <var>flattened output</var> for <a data-lt="jsonldprocessor-compact-input">input</a>,
                 <a data-lt="jsonldprocessor-flatten-context">context</a>,
-                and <a data-lt="jsonldprocessor-flatten-options">options</a>.</li>
+                and <a data-lt="jsonldprocessor-flatten-options">options</a>.
+                Set the <a data-lt="context-base-iri">base IRI</a> in <var>active context</var> to the {{JsonLdOptions/base}} option
+                from <a data-lt="jsonldprocessor-flatten-options">options</a>, if set;
+                otherwise, if the <a data-link-for="JsonLdOptions">compactToRelative</a> option is <strong>true</strong>,
+                to the IRI of the currently being processed document, if available;
+                otherwise to <code>null</code>.</li>
             </ol>
           </li>
           <li>Resolve the <var>promise</var> with <var>flattened output</var>