fixed validity errors
diff --git a/teiTextHeaderSkeleton.tei.xml b/teiTextHeaderSkeleton.tei.xml
index 73f543a..367652f 100644
--- a/teiTextHeaderSkeleton.tei.xml
+++ b/teiTextHeaderSkeleton.tei.xml
@@ -1,4 +1,5 @@
<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE teiHeader SYSTEM "tei_all.dtd">
<teiHeader>
<!-- TEI TEXTHEADER SKELETON FOR KLK-FI. HL 2024-08-30 -->
@@ -44,8 +45,8 @@
<publisher>[$TODO]</publisher>
</imprint>
<biblScope unit="ISSUETITLE">[$ISSUETITLE]</biblScope>
- <biblScope unit="ISSUENO"/>[$ISSUENO]</biblScope>
- <biblScope unit="ISSUEDATE"/>[$ISSUEDATE]</biblScope>
+ <biblScope unit="ISSUENO">[$ISSUENO]</biblScope>
+ <biblScope unit="ISSUEDATE">[$ISSUEDATE]</biblScope>
<biblScope unit="pp">[$PAGENO]</biblScope>
</monogr>
</biblStruct>