diff --git a/cop/collection.go b/cop/collection.go
index 852dc1a..861772a 100644
--- a/cop/collection.go
+++ b/cop/collection.go
@@ -2,37 +2,88 @@ package cop
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
-	"io/fs"
 	"log"
 	"os"
 	"path"
-	"path/filepath"
 	"strings"
 
-	"github.com/go-git/go-git/v5"
-
 	"gitea.mmo.to/ppForge/ppforge/globals"
 	"gitea.mmo.to/ppForge/ppforge/protocol"
 )
 
 // GlobalCOP is the global variable holding the protocol collections,
-var GlobalCOP *ProtocolCollectionList = &ProtocolCollectionList{[]COP{}}
+var GlobalCOP *ProtocolCollectionList = &ProtocolCollectionList{[]COPer{}}
+
+// CollectionTypes contains the functions to create actual objects from JSON
+var CollectionTypes map[string](func([]byte) (COPer, error))
+
+// InitCollectionTypes initializes the functions for each actual object
+func InitCollectionTypes() {
+	CollectionTypes = map[string]func([]byte) (COPer, error){}
+	//CollectionTypes["COP"] = COPFromJSON
+	CollectionTypes["FileCOP"] = FileCOPFromJSON
+	//CollectionTypes["FileCOPFromGitRemote"] = FileCOPGitRemoteFromJSON
+}
 
 // ProtocolCollectionList is a list of all databases, with the most simple interface
 type ProtocolCollectionList struct {
-	PCs []COP
+	PCs []COPer
+}
+
+// COPer interface defines the functions a CollectionOfProtocols should have at least.
+type COPer interface {
+	Open(string) error
+	Close() error
+	GetProtocols() ([]ProtocolCollectionEntry, error)
+	AddOrUpdate(*protocol.Protocol) error
+	Sync() error
+	Get(string) (*protocol.Protocol, error)
+	ToJSON() (string, error)
+}
+
+// Init initializes the databases, opens the default one and checks for others if available
+func init() {
+	InitCollectionTypes()
+	Init()
+}
+
+// Init the global COP
+func Init() {
+	// initialize default db
+	fdb := FileCOP{COP{"FileCOP", map[string]ProtocolCollectionEntry{}, false}, globals.CollectionOfProtocolsDir}
+	err := fdb.Open(globals.CollectionOfProtocolsDir)
+	if err != nil {
+		log.Printf("Error opening global COP dir: %v", err)
+		return
+	}
+	err = fdb.Sync()
+	if err != nil {
+		log.Printf("Error on initial syncing of the global COP dir: %v", err)
+		return
+	}
+	GlobalCOP.PCs = append(GlobalCOP.PCs, &fdb)
+	log.Printf("Amount of databases available %d", len(GlobalCOP.PCs))
+}
+
+// GetCOP returns the global collection of Protocols
+func GetCOP() *ProtocolCollectionList {
+	return GlobalCOP
 }
 
 // WriteCache updates the cache file of the available protocols
 func (pcl *ProtocolCollectionList) WriteCache() error {
 	// [impl->dsn~protocol-collection-cache~0>>utest]
-	data, err := json.MarshalIndent(pcl, "", "  ")
-	if err != nil {
-		return err
+	cops := []string{}
+	for _, pc := range pcl.PCs {
+		str, err := pc.ToJSON()
+		if err != nil {
+			log.Println(err)
+		}
+		cops = append(cops, str)
 	}
-	err = os.WriteFile(path.Join(globals.CollectionOfProtocolsDir, globals.COPCacheFileName), data, 0644)
+	data := "{ \"PCs\": [" + strings.Join(cops, ",") + "]}"
+	err := os.WriteFile(path.Join(globals.CollectionOfProtocolsDir, globals.COPCacheFileName), []byte(data), 0644)
 	return err
 }
 
@@ -46,183 +97,20 @@ func (pcl *ProtocolCollectionList) ReadCache() error {
 		return err
 	}
 	//fmt.Println(string(data))
-	err = json.Unmarshal(data, pcl)
-	data, err = json.MarshalIndent(pcl, "", "  ")
+	var raw map[string][]interface{}
+	err = json.Unmarshal(data, &raw)
+	PCs := raw
+	for _, rawcop := range PCs["PCs"] {
+		cop := rawcop.(map[string]interface{})
+		coptype := cop["Type"].(string)
+		copjson, err := json.Marshal(rawcop)
+		fmt.Println(string(copjson))
+		if err != nil {
+			log.Println(err)
+		}
+		coper, err := CollectionTypes[coptype](copjson)
+		pcl.PCs = append(pcl.PCs, coper)
+	}
 	fmt.Println(string(data))
 	return err
 }
-
-// ProtocolCollectionEntry is a single entry in the file database, additionally to the meta data the path is required
-type ProtocolCollectionEntry struct {
-	Path     string
-	Protocol protocol.ProtocolMeta
-}
-
-// Init initializes the databases, opens the default one and checks for others if available
-func init() {
-	Init()
-}
-
-// Init the global COP
-func Init() {
-	// initialize default db
-	fdb := FileCOP{COP{map[string]ProtocolCollectionEntry{}, false}, globals.CollectionOfProtocolsDir}
-	err := fdb.Open(globals.CollectionOfProtocolsDir)
-	if err != nil {
-		log.Printf("Error opening global COP dir: %v", err)
-		return
-	}
-	err = fdb.Sync()
-	if err != nil {
-		log.Printf("Error on initial syncing of the global COP dir: %v", err)
-		return
-	}
-	GlobalCOP.PCs = append(GlobalCOP.PCs, fdb.COP)
-	log.Printf("Amount of databases available %d", len(GlobalCOP.PCs))
-}
-
-// GetCOP returns the global collection of Protocols
-func GetCOP() *ProtocolCollectionList {
-	return GlobalCOP
-}
-
-// COP represents a Collection of Protocols
-type COP struct {
-	Protocols map[string]ProtocolCollectionEntry
-	closed    bool
-}
-
-// COPer interface defines the functions a CollectionOfProtocols should have at least.
-type COPer interface {
-	Open(string) error
-	Close() error
-	GetProtocols() ([]ProtocolCollectionEntry, error)
-	Add(*protocol.Protocol) error
-	Sync() error
-	Update(*protocol.Protocol) error
-	Get(string) (*protocol.Protocol, error)
-}
-
-// FileCOP implements
-type FileCOP struct {
-	COP
-	Path string
-}
-
-// FileCOPFromGitRemote implements retrieving the latest stuff from an external git remote additionally to the FileDatabase functionality
-type FileCOPFromGitRemote struct {
-	FileCOP
-	RemoteGitRepository string
-	gitRepo             git.Repository
-}
-
-// NewFileCOP returns a new FileCOP instance from a given path
-func NewFileCOP(path string) (*FileCOP, error) {
-	fCOP := &FileCOP{}
-	err := fCOP.Open(path)
-	if err != nil {
-		log.Printf("Error opening file COP at %s: %v", path, err)
-		return nil, err
-	}
-	err = fCOP.Sync()
-	return fCOP, err
-}
-
-// Open the database
-func (fd *FileCOP) Open(path string) error {
-	fileinfo, err := os.Stat(path)
-	if err == os.ErrNotExist {
-		return err
-	}
-	if fileinfo == nil || !fileinfo.IsDir() {
-		return fmt.Errorf("Path %s is not a directory or does not exist", path)
-	}
-	fd.Path = path
-	fd.closed = false
-	return nil
-}
-
-// Close the database and free the data
-func (fd *FileCOP) Close() error {
-	fd.closed = true
-	return nil
-}
-
-// GetProtocols returns the map of protocols or an error if the first read failed
-func (fd *FileCOP) GetProtocols() ([]ProtocolCollectionEntry, error) {
-	if fd.closed {
-		return nil, errors.New("COP closed, no protocols to deliver")
-	}
-	entries := []ProtocolCollectionEntry{}
-	if !fd.closed && len(fd.Protocols) == 0 {
-		fd.Protocols = map[string]ProtocolCollectionEntry{}
-		err := fd.Sync()
-		if err != nil {
-			return nil, err
-		}
-	}
-	if entries == nil || len(entries) == 0 {
-		entries = make([]ProtocolCollectionEntry, 0)
-		for _, v := range fd.Protocols {
-			entries = append(entries, v)
-		}
-	}
-	return entries, nil
-}
-
-// Add puts a new protocol into the path of the file database
-func (fd *FileCOP) Add(prot *protocol.Protocol) error {
-	if fd.closed {
-		return errors.New("Cannot add, FileCOP is closed")
-	}
-	p := path.Join(fd.Path, prot.Metadata.Name, ".protocoljson")
-	err := prot.Save(p)
-	if err == nil {
-		fd.Protocols[prot.Metadata.Name] = ProtocolCollectionEntry{p, prot.Metadata}
-	}
-	return err
-}
-
-// Update updates an existing entry through saving the contents of the protocol to the file, or just adding it anew
-func (fd *FileCOP) Update(prot *protocol.Protocol) error {
-	if fd.closed {
-		return errors.New("Cannot update, FileCOP is closed")
-	}
-	if v, ok := fd.Protocols[prot.Metadata.Name]; ok {
-		v.Protocol = prot.Metadata
-		return prot.Save(v.Path)
-	}
-	return fd.Add(prot)
-}
-
-// Sync just rereads all files
-func (fd *FileCOP) Sync() error {
-	if fd.closed {
-		return errors.New("Cannot sync, FileCOP is closed")
-	}
-	// recurse recursively through the path
-	if fd.Protocols == nil {
-		fd.Protocols = make(map[string]ProtocolCollectionEntry)
-	}
-	err := filepath.Walk(fd.Path, func(path string, info fs.FileInfo, err error) error {
-		if !info.IsDir() && strings.HasSuffix(info.Name(), ".protocoljson") {
-			prot, err := protocol.LoadNew(path)
-			if err == nil {
-				// add to map
-				// add to map
-				entry := ProtocolCollectionEntry{path, prot.Metadata}
-
-				fd.Protocols[prot.Metadata.Name] = entry
-			}
-			return err
-		}
-		return nil
-	})
-	return err
-}
-
-// Get a protocol by name
-func (fd *FileCOP) Get(prot string) (*protocol.Protocol, error) {
-	entry := fd.Protocols[prot]
-	return protocol.LoadNew(entry.Path)
-}
diff --git a/cop/collection_test.go b/cop/collection_test.go
index a4d9c88..4c6df2f 100644
--- a/cop/collection_test.go
+++ b/cop/collection_test.go
@@ -12,6 +12,7 @@ import (
 
 	"gitea.mmo.to/ppForge/ppforge/cop"
 	"gitea.mmo.to/ppForge/ppforge/globals"
+	"gitea.mmo.to/ppForge/ppforge/protocol"
 )
 
 func getCurrentDir() string {
@@ -94,14 +95,9 @@ func TestClosed(t *testing.T) {
 		fmt.Println("Protocols did not deliver error")
 		t.Fail()
 	}
-	err = fcop.Add(nil)
+	err = fcop.AddOrUpdate(nil)
 	if err == nil {
-		fmt.Println("Add did not deliver error")
-		t.Fail()
-	}
-	err = fcop.Update(nil)
-	if err == nil {
-		fmt.Println("Update did not deliver error")
+		fmt.Println("AddOrUpdate did not deliver error")
 		t.Fail()
 	}
 	err = fcop.Sync()
@@ -128,7 +124,7 @@ func TestGlobalCOP(t *testing.T) {
 		fmt.Println("Error on loading new FileCOP", err)
 		t.Fail()
 	}
-	gcop.PCs = append(gcop.PCs, fcop.COP)
+	gcop.PCs = append(gcop.PCs, fcop)
 
 	fmt.Printf("Length of all Protocol Collections: %d\n", len(gcop.PCs))
 	if len(gcop.PCs) != 2 {
@@ -142,15 +138,15 @@ func TestCOPCache(t *testing.T) {
 	defer td(t)
 	gcop := cop.GlobalCOP
 	// reset to zero because of other tests
-	gcop.PCs = []cop.COP{}
+	gcop.PCs = []cop.COPer{}
 	cop.Init()
 	c := gcop.PCs[0]
-	protos := c.Protocols
+	protos, err := c.GetProtocols()
 	if len(protos) != 4 {
 		t.Fail()
 	}
 
-	err := gcop.WriteCache()
+	err = gcop.WriteCache()
 	if err != nil {
 		fmt.Println("Writing the cache file failed")
 		t.Fail()
@@ -162,17 +158,44 @@ func TestCOPCache(t *testing.T) {
 	}
 
 	// reset again and check if reading the cache works
-	gcop.PCs = []cop.COP{}
+	gcop.PCs = []cop.COPer{}
 
 	err = gcop.ReadCache()
 	if err != nil {
-		fmt.Println("Reading the cache file failed")
+		fmt.Println("Reading the cache file failed", err)
 		t.Fail()
 	}
 	c = gcop.PCs[0]
-	protos = c.Protocols
+	protos, err = c.GetProtocols()
 	if len(protos) != 4 {
 		t.Fail()
 	}
-
+}
+
+func TestAddOrUpdate(t *testing.T) {
+	td := setupSuite(t)
+	defer td(t)
+	gcop := cop.GlobalCOP
+	gcop.PCs = []cop.COPer{}
+	cop.Init()
+
+	prot := protocol.NewProtocolStructure()
+	prot.Metadata.Name = "TestAddOrUpdate"
+	prot.Metadata.Description = "A protocol of the unit tests to test AddOrUpdate of a protocol collection"
+	prot.Metadata.Version = "1.0"
+	prot.Metadata.Revision = 0
+	prot.Metadata.TCPIPLayer = 1
+
+	f := protocol.NewField(
+		"Testfield",
+		"A field for the unit tests of protocol collections...",
+		"",
+		32,
+		nil,
+		false,
+		false,
+	)
+	prot.AddField(0, f)
+	col := gcop.PCs[0]
+	col.AddOrUpdate(prot)
 }
diff --git a/cop/cop.go b/cop/cop.go
new file mode 100644
index 0000000..e57a267
--- /dev/null
+++ b/cop/cop.go
@@ -0,0 +1,16 @@
+package cop
+
+import "gitea.mmo.to/ppForge/ppforge/protocol"
+
+// COP represents a Collection of Protocols
+type COP struct {
+	Type      string
+	Protocols map[string]ProtocolCollectionEntry
+	closed    bool
+}
+
+// ProtocolCollectionEntry is a single entry in the file database, additionally to the meta data the path is required
+type ProtocolCollectionEntry struct {
+	Path     string
+	Protocol protocol.ProtocolMeta
+}
diff --git a/cop/filecop.go b/cop/filecop.go
new file mode 100644
index 0000000..9f9ffb7
--- /dev/null
+++ b/cop/filecop.go
@@ -0,0 +1,137 @@
+package cop
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io/fs"
+	"log"
+	"os"
+	"path"
+	"path/filepath"
+	"strings"
+
+	"gitea.mmo.to/ppForge/ppforge/protocol"
+)
+
+// FileCOP implements
+type FileCOP struct {
+	COP
+	Path string
+}
+
+// FileCOPFromJSON creates a FileCOP
+func FileCOPFromJSON(data []byte) (COPer, error) {
+	fcop := &FileCOP{}
+	err := json.Unmarshal(data, fcop)
+	return fcop, err
+}
+
+// NewFileCOP returns a new FileCOP instance from a given path
+func NewFileCOP(path string) (*FileCOP, error) {
+	fCOP := &FileCOP{}
+	err := fCOP.Open(path)
+	if err != nil {
+		log.Printf("Error opening file COP at %s: %v", path, err)
+		return nil, err
+	}
+	err = fCOP.Sync()
+	return fCOP, err
+}
+
+// Open the database
+func (fd *FileCOP) Open(path string) error {
+	fileinfo, err := os.Stat(path)
+	if err == os.ErrNotExist {
+		return err
+	}
+	if fileinfo == nil || !fileinfo.IsDir() {
+		return fmt.Errorf("Path %s is not a directory or does not exist", path)
+	}
+	fd.Path = path
+	fd.closed = false
+	return nil
+}
+
+// Close the database and free the data
+func (fd *FileCOP) Close() error {
+	fd.closed = true
+	return nil
+}
+
+// GetProtocols returns the map of protocols or an error if the first read failed
+func (fd *FileCOP) GetProtocols() ([]ProtocolCollectionEntry, error) {
+	if fd.closed {
+		return nil, errors.New("COP closed, no protocols to deliver")
+	}
+	entries := []ProtocolCollectionEntry{}
+	if !fd.closed && len(fd.Protocols) == 0 {
+		fd.Protocols = map[string]ProtocolCollectionEntry{}
+		err := fd.Sync()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if entries == nil || len(entries) == 0 {
+		entries = make([]ProtocolCollectionEntry, 0)
+		for _, v := range fd.Protocols {
+			entries = append(entries, v)
+		}
+	}
+	return entries, nil
+}
+
+// AddOrUpdate puts a new protocol into the path of the file database
+func (fd *FileCOP) AddOrUpdate(prot *protocol.Protocol) error {
+	if fd.closed {
+		return errors.New("Cannot add or update, FileCOP is closed")
+	}
+	if v, ok := fd.Protocols[prot.Metadata.Name]; ok {
+		v.Protocol = prot.Metadata
+		return prot.Save(v.Path)
+	}
+	p := path.Join(fd.Path, prot.Metadata.Name, ".protocoljson")
+	err := prot.Save(p)
+	if err == nil {
+		fd.Protocols[prot.Metadata.Name] = ProtocolCollectionEntry{p, prot.Metadata}
+	}
+	return err
+}
+
+// Sync just rereads all files
+func (fd *FileCOP) Sync() error {
+	if fd.closed {
+		return errors.New("Cannot sync, FileCOP is closed")
+	}
+	// recurse recursively through the path
+	if fd.Protocols == nil {
+		fd.Protocols = make(map[string]ProtocolCollectionEntry)
+	}
+	err := filepath.Walk(fd.Path, func(path string, info fs.FileInfo, err error) error {
+		if !info.IsDir() && strings.HasSuffix(info.Name(), ".protocoljson") {
+			prot, err := protocol.LoadNew(path)
+			if err == nil {
+				// add to map
+				// add to map
+				entry := ProtocolCollectionEntry{path, prot.Metadata}
+
+				fd.Protocols[prot.Metadata.Name] = entry
+			}
+			return err
+		}
+		return nil
+	})
+	return err
+}
+
+// Get a protocol by name
+func (fd *FileCOP) Get(prot string) (*protocol.Protocol, error) {
+	entry := fd.Protocols[prot]
+	return protocol.LoadNew(entry.Path)
+}
+
+// ToJSON marshals the FileCOP to JSON
+func (fd *FileCOP) ToJSON() (string, error) {
+	by, err := json.MarshalIndent(fd, "", "  ")
+	return string(by), err
+}
diff --git a/cop/filecopgitremote.go b/cop/filecopgitremote.go
new file mode 100644
index 0000000..9d0c6e4
--- /dev/null
+++ b/cop/filecopgitremote.go
@@ -0,0 +1,10 @@
+package cop
+
+import "github.com/go-git/go-git/v5"
+
+// FileCOPGitRemote implements retrieving the latest stuff from an external git remote additionally to the FileDatabase functionality
+type FileCOPGitRemote struct {
+	FileCOP
+	RemoteGitRepository string
+	gitRepo             git.Repository
+}