Merge branch '2083-custom-schema-for-tabular-parser-are-failing-to-process' into 'develop'

Resolve "custom schema for tabular parser are failing to process"

Closes #2083

See merge request !1993

examples/data/tabular/README.md

@@ -3,4 +3,10 @@ This upload demonstrates the use of tabular data. In this example we use an *xls
 This schema is meant as a starting point. You can download the schema file and
 extend the schema for your own tables.
 
+In order to see the parsed data, create an entry by clicking on the **_create from schema_** button,
+pick a name for your entry, and select **_Custom schema_** from the options. Then click on the
+search icon, from the dialogue, click on the _**Periodic Table**_ and select **_Element_** from the
+dropdown menu. Clicking on `Create` would trigger the parser and you should be able to see all elements
+successfully parsed into individual entries.
+
 Consult our [documentation on the NOMAD Archive and Metainfo](https://nomad-lab.eu/prod/v1/staging/docs/) to learn more about schemas.

examples/data/tabular/periodic-table.archive.yaml

@@ -5,7 +5,7 @@ definitions:
   sections:
     Element:
       more:
-        label_quantity: '#/data/name'
+        label_quantity: name
       base_sections:
         # We use ElnBaseSection here. This provides a few quantities (name, ags)description, t
         # that are added to the search index. If we map table columns to these quantities,