abstraction 2.1: a poem states its object range

- A poem is a container of verse, and stores its range of verse ocn,
  - its verse are the citable units with ocn.

- A note in the last verse of a poem previously was not gathered into
  the endnotes section, this now is fixed

Format 2.0 -> 2.1: the property is an addition, the poem is not a
citable object (but contans a range of objects), its verse are
(individual citable objects), and every reader checks the major version.
A 2.0 database reads as having no ranges.

(assisted by Claude-Code)

1 files changed, 9 insertions, 1 deletions

diff --git a/src/sisudoc/ocda/abstraction/ssp_in.d b/src/sisudoc/ocda/abstraction/ssp_in.d
index 0e461ad..0c67ab2 100644
--- a/src/sisudoc/ocda/abstraction/ssp_in.d
+++ b/src/sisudoc/ocda/abstraction/ssp_in.d
@@ -76,7 +76,7 @@ template spineAbstractionRead() {
        object sections in the order the file gives them
   +/
   struct SSPdocument {
-    string                         format;        // "% SiSU Document Abstraction v2.0"
+    string                         format;        // "% SiSU Document Abstraction v2.1"
     string                         source;        // "% Source: ..."
     string[string]                 source_info;   // the @source block
     string[]                       source_info_order;
@@ -230,6 +230,14 @@ template spineAbstractionRead() {
       case "section":               obj.metainfo.is_of_section         = _val; break;
       case "parent":                obj.metainfo.parent_ocn            = _val.to!int; break;
       case "last_descendant":       obj.metainfo.last_descendant_ocn   = _val.to!int; break;
+      case "ocn_range": {
+        auto _r = _ints(_val);
+        if (_r.length == 2) {
+          obj.metainfo.ocn_range_first = _r[0];
+          obj.metainfo.ocn_range_last  = _r[1];
+        }
+        break;
+      }
       case "children":              obj.metainfo.children_headings     = _ints(_val); break;
       case "ancestors":
         obj.metainfo.markedup_ancestors = _eight(_val);