diff --git a/src/dodb/partition.cr b/src/dodb/partition.cr
index cfcafb8..0880386 100644
--- a/src/dodb/partition.cr
+++ b/src/dodb/partition.cr
@@ -66,7 +66,7 @@ class DODB::Partition(V) < DODB::Indexer(V)
 		delete partition, do true end
 	end
 
-	def delete(partition, &matcher)
+	def delete(partition, &matcher : Proc(V, Bool))
 		partition_directory = indexing_directory partition
 
 		return unless Dir.exists? partition_directory
@@ -155,7 +155,7 @@ class DODB::CachedPartition(V) < DODB::Partition(V)
 		get_with_indexes(partition).map &.[0]
 	end
 
-	def delete(partition, &matcher)
+	def delete(partition, &matcher : Proc(V, Bool))
 		# Use `get_with_indexes` to retrieve data on-disk, if necessary.
 		new_partition = get_with_indexes(partition).map(&.[1]).select do |key|
 			item = @storage[key]
@@ -164,10 +164,13 @@ class DODB::CachedPartition(V) < DODB::Partition(V)
 
 		@data[partition] = new_partition
 
-		super(partition, matcher)
+		super(partition, &matcher)
 	end
 end
 
+# `DODB::RAMOnlyPartition` enables the flexibility of partitions without a file-system representation.
+# Absolute efficiency, exactly as easy to use as the other partition implementations.
+
 class DODB::RAMOnlyPartition(V) < DODB::CachedPartition(V)
 	def index(key, value)
 		partition = key_proc.call value
@@ -202,7 +205,7 @@ class DODB::RAMOnlyPartition(V) < DODB::CachedPartition(V)
 		r_value
 	end
 
-	def delete(partition, &matcher)
+	def delete(partition, &matcher : Proc(V, Bool))
 		if keys = @data[partition]?
 			new_partition = keys.select do |key|
 				item = @storage[key]
diff --git a/src/dodb/tags.cr b/src/dodb/tags.cr
index 48113fc..d4a31e2 100644
--- a/src/dodb/tags.cr
+++ b/src/dodb/tags.cr
@@ -181,11 +181,13 @@ class DODB::CachedTags(V) < DODB::Tags(V)
 
 		@data[tag] = new_tag
 
-		super(tag, matcher)
+		super(tag, &matcher)
 	end
 end
 
-# TODO
+# `DODB::RAMOnlyTags` enables the flexibility of tags without a file-system representation.
+# Absolute efficiency, exactly as easy to use as the other tag implementations.
+
 class DODB::RAMOnlyTags(V) < DODB::CachedTags(V)
 	def index(key, value)
 		indices = key_proc.call value