diff --git a/docs/csaf_aggregator.md b/docs/csaf_aggregator.md
index 53d8506..2ad964c 100644
--- a/docs/csaf_aggregator.md
+++ b/docs/csaf_aggregator.md
@@ -124,10 +124,11 @@ a `service.json` will be written listing its ROLIE feed documents.
 If it is not set or set to false, then no `service.json` will be written.
 
 To further dissect CSAF-documents by criteria like document category,
-languages or values of the branch category within the Product Tree you
-can set a providers categories value as an array of either
-literal categories or, by prepending "expr:", have it be read
-through JSONPath values.
+languages or values of the branch category within the product tree you
+can set providers categories values. This can be done using an array
+of strings taken literally or, by prepending "expr:", have it be read
+through JSONPath values. For a more detailed explanation,
+[refer to the provider config.](csaf_provider.md)
 
 #### Example config file
 <!-- MARKDOWN-AUTO-DOCS:START (CODE:src=../docs/examples/aggregator.toml) -->