From 1aad91bd66c99513cb8d866767c18bb5e575cf28 Mon Sep 17 00:00:00 2001
From: kthoden <kthoden@gwdg.de>
Date: Tue, 30 Jul 2019 11:32:47 +0200
Subject: [PATCH] Footnotes without IDs are dangerous

---
 tei2imxml.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tei2imxml.py b/tei2imxml.py
index 4297040..c76ed1f 100755
--- a/tei2imxml.py
+++ b/tei2imxml.py
@@ -618,7 +618,11 @@ def handle_refs_hyperimage(ref):
 
         fn_parent = footnote.getparent()
         # we assert here that the parent of a footnote is always a paragraph or a quote
-        footnote_id = footnote.xpath("@xml:id")[0]
+        try:
+            footnote_id = footnote.xpath("@xml:id")[0]
+        except IndexError:
+            logging.error("Found footnote without xml:id. Exiting.")
+            sys.exit(1)
 
         # logging.debug(f"The prefix of fn_parent is {fn_parent.prefix}.")