diff --git a/metadata-readme/Botanical-illustrations-metadata-readme.md b/metadata-readme/Botanical-illustrations-metadata-readme.md
index a826e89499a68bb5c51ba9a01a334185285b7c34..098b85e5f69f9019b2a964100b1b8e3c4b3e006c 100644
--- a/metadata-readme/Botanical-illustrations-metadata-readme.md
+++ b/metadata-readme/Botanical-illustrations-metadata-readme.md
@@ -20,16 +20,16 @@ This Readme offers explanations for all attributes of the metadata csv table to
 | corperations | personal name of corperation involved | none | string |
 | publishers | personal name of publisher if known | none | string |
 | placesOfPublication | placename for place of creation or place of publication, not linked to authority file; "Ohne Ort" stands for "no placename known"; Cave: Those entries that do not have a value do not necessarely have no place of publication | none | string |
-| yearOfPublication | | some | string |
-| dateOfPublication | | some | string |
-| Subjects | | some | string |
-| GND-Links | | some | string |
+| yearOfPublication | year of creation of the artwork | all | integer |
+| dateOfPublication | year of creation of the artwork, identical to "yearOfPublication" | all | integer |
+| Subjects | subject terms in German as used in the RSWK (Regeln für Schlagwortkatalogisierung), usually in the form of the GND authority file; the subject term can also be a term for a document type (e.g. "Pflanzen"); Please note that the subject terms are not fully consistent within the dataset | most | string |
+| GND-Links | URLs (PIDs) for GND-referenced subject terms; multiple values are comma separated | most | string |
 | gndReferences | | some | string |
-| classifications | | some | string |
-| contentInformations | | some | string |
-| physicalPages | | some | string |
-| illustrations | | some | string |
-| physicalFormat | | some | string |
-| sequence | | some | string |
-| urls | | some | string |
-| idnr | | some | string |
+| classifications | NA | some | string |
+| contentInformations | pyhsical description of the document | all | string |
+| physicalPages | number of pages; for this dataset every item is one page | none | string |
+| illustrations | information about the illustrations; for this dataset the number of illustration per page is one | none | string |
+| physicalFormat | dimensions of the leaves in centimeter | most | string |
+| sequence | NA | none | string |
+| urls | URL to entry in ÖNB Digital  | all | string |
+| idnr |  ID for the MARC record in the Austrian Union Catalogue; Please refer to this ID for the bibliographic description in the public catalogue (OPAC); in the form of "\{GZ\d{8}\}" where "G" stands for "Gideon", the database the data was migrated from into the library system ALMA | all | string |