blog post updated for 1951 layout, date of the N printing, #728, meta…

…norma/metanorma-iso#1089

_posts/2024-03-20-iso-old-layouts.adoc

@@ -55,12 +55,17 @@ Therefore, the document attribute `:doctype:` should be set to the value `recomm
 ```
 
 The last page provides the 'Date of the first printing' and 'Price'. You can set these data by
-the document attributes `:presentation-metadata-first-printing-date:`, `:presentation-metadata-price:`, for instance:
+the document attributes `:presentation-metadata-printing-date:`, `:presentation-metadata-price:`, for instance:
 ```
-:presentation-metadata-first-printing-date: 1965-12-01
+:presentation-metadata-printing-date: 1965-12-01
 :classification: UDC:563.5.081:537.71
 ```
 
+For the 'Date of the second printing' and further printings, you need to specify the number of the printing
+before the date like this:
+```
+:presentation-metadata-printing-date: second,1965-12-01
+```
 
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