Resolve #320

Author: petervwyatt

docs/32000-2-2020/clause07.md

@@ -816,6 +816,17 @@ there is no way to specify that metadata is to be left unencrypted in these case
     (<i>Optional; PDF 1.3<del onMouseEnter="mouseEnter(this)" data-issue="106" data-iso="submitted">; indirect reference preferred</del></i>) ...
     </td>
   </tr>
+  <tr>
+    <td><b>B</b></td>
+    <td>array</td>
+    <td>
+    (<i>Optional; PDF 1.1; recommended if the page contains article beads</i>) An array that shall contain indirect references to all article beads 
+    appearing on the page (see 12.4.3, "Articles"). The beads shall be listed in the array in 
+    <del onMouseEnter="mouseEnter(this)" data-issue="320">natural</del> reading order. 
+    Objects of <b>Type</b> <i>Template</i> shall have no <b>B</b> key.
+    <p>...</p>
+    </td>
+  </tr>
 </table>
 
 

docs/32000-2-2020/clause12.md

@@ -3,7 +3,7 @@ subset: PDF 2.0
 isodoc: ISO 32000-2:2020
 clause: 12
 title: Interactive features
-modified: 6 October 2023
+modified: 24 October 2023
 ---
 
 <ul class="noprint">
@@ -25,6 +25,8 @@ modified: 6 October 2023
   <ul>
    <li><a href="#H12.4.2">12.4.2 Page labels <ins onMouseEnter="mouseEnter(this)" data-issue="73" data-iso="approved"> and indices</ins></a>
    </li>
+   <li><a href="#H12.4.3">12.4.3 Articles</a>
+   </li>
    <li>12.4.4 Presentations
     <ul>
      <li><a href="#H12.4.4.1">12.4.4.1 General</a>
@@ -316,8 +318,19 @@ an <b>SD</b> entry as defined in "Table 201 — Action types".</del><ins onMouse
 <p>...</p>
 
 
-<h3 id="H12.4.4">12.4.4 Presentations</h3>
+<h3 id="H12.4.3">12.4.3 Articles</h3>
+
+<p>...</p>
+
+<p class="location">Change the paragraph before Table 162 as follows:</p>
 
+<p>
+The optional <b>Threads</b> entry in the document catalog dictionary (see 7.7.2, "Document catalog dictionary") holds an array of thread dictionaries ("Table 162 — Entries in a thread dictionary") defining the document’s articles. Each individual bead within a thread shall be represented by a bead dictionary ("Table 163 — Entries in a bead dictionary"). The thread dictionary’s <b>F</b> entry shall refer to the first bead in the thread; the beads shall be chained together sequentially in a doubly linked list through their <b>N</b> (next) and <b>V</b> (previous) entries. In addition, for each page on which article beads appear, the page object (see 7.7.3, "Page tree") shall contain a <b>B</b> entry whose value is an array of indirect references to the beads on the page, 
+in <del onMouseEnter="mouseEnter(this)" data-issue="320">drawing</del><ins onMouseEnter="mouseEnter(this)" data-issue="320">reading</ins> order.
+</p>
+
+
+<h3 id="H12.4.4">12.4.4 Presentations</h3>
 
 <h4 id="H12.4.4.1">12.4.4.1 General</h4>