diff --git a/r2-shared-swift/BelongsTo.swift b/r2-shared-swift/BelongsTo.swift
index 4886b004..81296eea 100644
--- a/r2-shared-swift/BelongsTo.swift
+++ b/r2-shared-swift/BelongsTo.swift
@@ -8,6 +8,8 @@
 
 
 public class BelongsTo {
+    public init() {}
+
     public var series = [Collection]()
     public var collection = [Collection]()
 }
diff --git a/r2-shared-swift/Metadata.swift b/r2-shared-swift/Metadata.swift
index 6056ec71..8a75c55c 100644
--- a/r2-shared-swift/Metadata.swift
+++ b/r2-shared-swift/Metadata.swift
@@ -46,6 +46,7 @@ public class Metadata {
     public var source: String?
     public var epubType = [String]()
     public var rights: String?
+    public var rdfType: String?
     public var otherMetadata = [MetadataItem]()
     
     // TODO: support parsing from OPF.
diff --git a/r2-shared-swift/OPDS/Feed.swift b/r2-shared-swift/OPDS/Feed.swift
index 24b647c6..aadb774f 100644
--- a/r2-shared-swift/OPDS/Feed.swift
+++ b/r2-shared-swift/OPDS/Feed.swift
@@ -15,6 +15,7 @@ public class Feed {
     public var groups = [Group]()
     public var publications = [Publication]()
     public var navigation = [Link]()
+    public var context = [String]()
 
     public init(title: String) {
         self.metadata = OpdsMetadata(title: title)
diff --git a/r2-shared-swift/OPDS/OpdsMetadata.swift b/r2-shared-swift/OPDS/OpdsMetadata.swift
index a0828788..895bd916 100644
--- a/r2-shared-swift/OPDS/OpdsMetadata.swift
+++ b/r2-shared-swift/OPDS/OpdsMetadata.swift
@@ -15,6 +15,7 @@ public class OpdsMetadata {
     public var currentPage: Int?
     public var modified: Date?
     public var position: Int?
+    public var rdfType: String?
 
     init(title: String) {
         self.title = title