diff --git a/doc/METADATA.ini b/doc/METADATA.ini
index 275026578cf..ccd21e54578 100644
--- a/doc/METADATA.ini
+++ b/doc/METADATA.ini
@@ -59,7 +59,7 @@ version/minor=6
 
 #
 # Important metadata often used in configuration files
-# (and seldom in specifications)
+# and not used in specifications.
 #
 
 [order]
@@ -166,13 +166,6 @@ description= Internal metadata that must be ignored by other plugins.
 	Only if a type cannot be represented, e.g., the `toml`
 	plugin would use `internal/toml/type`.
 
-[line]
-type= int
-status= proposal
-description= contains the line number from which a key was read.
-note= is useful for validation problems when someone directly
-	edits files
-
 
 
 #
@@ -266,7 +259,7 @@ description= For this metadata only the presence is significant, not its value.
 
 [array]
 type= array-index
-status= proposed
+status= implemented
 description= Such keys have only keys conforming to Elektra’s arrays convention as subkeys.
 	If the metavalue is empty, the array is empty (no subkeys).
 	Otherwise the metavalue contains the last element.
@@ -311,9 +304,9 @@ note=  It is generally preferred that other metadata will be used to
 	deduce the needs of the specification, e.g. use check/validation
 	metadata instead of as given above.
 
-[config]
+[config/needs]
 type= string
-status= proposed
+status= implemented
 description= indicate that the mount point needs some
 	configuration for plugins in order to work.
 
@@ -764,18 +757,6 @@ description = a number of warnings, see src/error/specification
 
 
 
-#
-# Struct validation
-#
-
-
-[struct]
-type = vector <string>
-status = proposed
-description = checks if the subkeys form a valid struct with the given
-	names.
-	The validator makes sure that there are no keys for the struct missing.
-example = device mpoint type options [dumpfreq] [passno]
 
 
 #
@@ -973,12 +954,6 @@ type= string
 description= A ternary conditional style operator to define
 	relations between keys
 
-[condition/validsuffix]
-status= proposal
-usedby/plugin= conditionals
-type= string
-description= A unit of measure style prefix
-
 [check/condition/any/#]
 status= implemented
 usedby/plugin= conditionals
@@ -1059,12 +1034,6 @@ type= long
 status= implemented
 description= Trigger an error with given error number from src/error/specifications
 
-[trigger/error/nofail]
-usedby/plugin= error
-type= long
-status= proposal
-description= Add the error but do not fail (to test robustness of framework).
-
 [check/macaddr]
 status= implemented
 type= empty