diff --git a/spdx/model.go b/spdx/model.go
index e91856b..7d1105e 100644
--- a/spdx/model.go
+++ b/spdx/model.go
@@ -85,6 +85,9 @@ const (
 	TypePersistentIdSwh    = common.TypePersistentIdSwh
 	TypePersistentIdGitoid = common.TypePersistentIdGitoid
 
+	// F.5 Other
+	CategoryOther = common.CategoryOther
+
 	// 11.1 Relationship field types
 	RelationshipDescribes                 = common.TypeRelationshipDescribe
 	RelationshipDescribedBy               = common.TypeRelationshipDescribeBy
diff --git a/spdx/v2/common/external.go b/spdx/v2/common/external.go
index 8344ac6..2715815 100644
--- a/spdx/v2/common/external.go
+++ b/spdx/v2/common/external.go
@@ -21,11 +21,15 @@ const (
 	TypePackageManagerNuGet        string = "nuget"
 	TypePackageManagerBower        string = "bower"
 	TypePackageManagerPURL         string = "purl"
+
 	// F.4 Persistent-Id types
 	CategoryPersistentId   string = "PERSISTENT-ID"
 	TypePersistentIdSwh    string = "swh"
 	TypePersistentIdGitoid string = "gitoid"
 
+	// F.5 Other
+	CategoryOther string = "OTHER"
+
 	// 11.1 Relationship field types
 	TypeRelationshipDescribe                  string = "DESCRIBES"
 	TypeRelationshipDescribeBy                string = "DESCRIBED_BY"