diff --git a/metadata-readme/Die-Bombe-metadata-readme.md b/metadata-readme/Die-Bombe-metadata-readme.md
index 9e6281a5a0ebfc328e7835b678bd8352024f6a74..6c3d35a45ed9e12fab9db1c00cde9303459f33fe 100644
--- a/metadata-readme/Die-Bombe-metadata-readme.md
+++ b/metadata-readme/Die-Bombe-metadata-readme.md
@@ -1,23 +1,25 @@
-This Readme offers explanations for all attributes of the metadata csv table to the dataset "Botanical Illustrations"
+This Readme offers explanations for all attributes of the metadata csv table to the dataset "Die Bombe".
+The frequency attribute can have the value "all", "most", "some" or "none". It gives you an overview of how often a value is to be expected for the attribute explained in relation to the whole dataset.
+The CSV is an export of keys and values of the Relational Database (MySQL) used for ANNO.
 
 | attribute | explanation | frequency | datatype |
 | ---- | ---- | ---- | ---- |
-| manifest_id | | some | string |
-| aid | | some | string |
-| year | | some | string |
-| day | | some | string |
-| dc_title | | some | string |
-| dc_title_additional | | some | string |
-| subjects | | some | string |
-| place_of_publications | | some | string |
-| languages | | some | string |
-| dc_type | | some | string |
-| meta_type | | some | string |
-| ini_type | | some | string |
-| modification_datetime | | some | string |
-| longer_page_id | | some | string |
-| dc_date | | some | string |
-| link_pdf | | some | string |
-| link_old | | some | string |
-| has_ocr | | some | string |
-| page_count | | some | string |
\ No newline at end of file
+| manifest_id | ID for the IIIF manifest in the form of \{aidaaaammdd} | all | string |
+| aid | ID for issues contained in the ANNO database, usually an abbreviation for the title | all | string |
+| year | year of publication | all | integer |
+| day | date of publication | all | string |
+| dc_title | title of the newspaper | all | string |
+| dc_title_additional | subtitle or any other additional title of the resource | none | string |
+| subjects | subject terms (German), not linked to authority file; multiple values are separated by a hyphen | all | string |
+| place_of_publications | placename (German) of publication place, not linked to authority file | all | string |
+| languages | language of the document in the form of ISO-639-1 | all | string |
+| dc_type | type of the document (English); default is "newspaper" | all | string |
+| meta_type | type of document (German); default is "zeitungen" | all | string |
+| ini_type | value for database; default is "anno" | all | string |
+| modification_datetime | timestamp for date of last modification of the database entry | all | datetime |
+| longer_page_id | value is either "O" or "1" | all | integer |
+| dc_date | date of publication in ISO-form "aaaa-mm-dd"| all | date |
+| link_pdf | URL to PDF download of issue | all | string |
+| link_old | URL to issue in the ANNO interface | all | string |
+| has_ocr | value is "1" if the document has OCR, else value is "0" | all | integer |
+| page_count | number of pages for each issue | all | integer |