Add section about Parquet header in admin import.

Author: meistermeier

modules/ROOT/pages/tools/neo4j-admin/neo4j-admin-import.adoc

@@ -1014,6 +1014,21 @@ For example, you can use `uuid:ID(Person){label:Person}`, where the relationship
 * For examples of creating property uniqueness constraints, see link:{neo4j-docs-base-uri}/cypher-manual/current/constraints/managing-constraints/#create-property-uniqueness-constraints[Cypher Manual -> Create property uniqueness constraints].
 ====
 
+=== Extended header support for Parquet
+
+In addition to the header format supported by the CSV import, the Parquet import supports name-mapping header files.
+Those files contain two rows of entries, where the first row represents the name (incl. optional type, id group, etc.)
+and the second row referencing the name of the original columns in the data files.
+
+.movie_header.csv
+[source, csv]
+----
+movieId:ID,title,year:int,:LABEL
+id,movie_title,year,label
+----
+
+If a header file is provided for a set of labels or a relationship type, the importer will ignore columns not mentioned in the headers.
+
 [[import-tool-header-format-nodes]]
 == Node files