diff --git a/.idea/misc.xml b/.idea/misc.xml
deleted file mode 100644
index 063c298..0000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="GOROOT" path="/usr/lib/go" />
-</project>
\ No newline at end of file
diff --git a/.ref b/.ref
index ab4db83..c39a67a 100644
--- a/.ref
+++ b/.ref
@@ -1 +1,9 @@
 https://specifications.freedesktop.org/secret-service/latest/index.html
+https://developer-old.gnome.org/libsecret/unstable/
+https://developer-old.gnome.org/libsecret/0.18/
+https://people.gnome.org/~stefw/libsecret-docs/index.html
+
+
+Quick reference URLs:
+
+Dbus paths: https://specifications.freedesktop.org/secret-service/latest/ch12.html
diff --git a/consts.go b/consts.go
index b350926..90c189c 100644
--- a/consts.go
+++ b/consts.go
@@ -18,16 +18,16 @@ const (
 
 	// Methods
 
-	// DbusServiceChangeLock is [FUNCTION UNKNOWN; TODO.]
-	DbusServiceChangeLock string = DbusInterfaceService + ".ChangeLock"
+	/*
+		DbusServiceChangeLock has some references in the SecretService Dbus API but
+		it seems to be obsolete - undocumented, at the least.
+	*/
+	// DbusServiceChangeLock string = DbusInterfaceService + ".ChangeLock"
 
-	// DbusServiceCreateCollection is used to create a new Collection if it doesn't exist in Dbus.
+	// DbusServiceCreateCollection is used to create a new Collection via Service.CreateCollection.
 	DbusServiceCreateCollection string = DbusInterfaceService + ".CreateCollection"
 
-	/*
-		DbusServiceGetSecrets is used to fetch all Secret / Item items in a given Collection
-		(via Service.GetSecrets).
-	*/
+	// DbusServiceGetSecrets is used to fetch all Secret / Item items in a given Collection (via Service.GetSecrets).
 	DbusServiceGetSecrets string = DbusInterfaceService + ".GetSecrets"
 
 	// DbusServiceLock is used by Service.Lock.
@@ -63,7 +63,7 @@ const (
 		DbusInterfaceSession is the Dbus interface for working with a Session.
 		Found at /org/freedesktop/secrets/session/<session ID>/(DbusInterfaceSession)
 	*/
-	DbusInterfaceSession = DbusServiceBase +  ".Session"
+	DbusInterfaceSession = DbusServiceBase + ".Session"
 
 	// Methods
 
@@ -128,6 +128,26 @@ const (
 
 	// DbusItemSetSecret is used by Item.SetSecret.
 	DbusItemSetSecret string = DbusInterfaceItem + ".SetSecret"
+
+	// Properties
+
+	// DbusItemLocked is a Dbus boolean for Item.Locked.
+	DbusItemLocked string = DbusInterfaceItem + ".Locked"
+
+	// DbusItemAttributes contains attributes (metadata, schema, etc.) for Item.Attributes.
+	DbusItemAttributes string = DbusInterfaceItem + ".Attributes"
+
+	// DbusItemLabel is the name (label) for Item.Label.
+	DbusItemLabel string = DbusInterfaceItem + ".Label"
+
+	// DbusItemType is the type of an Item (Item.Type).
+	DbusItemType string = DbusInterfaceItem + ".Type"
+
+	// DbusItemCreated is the time an Item was created (in a UNIX Epoch uint64) for Item.Created.
+	DbusItemCreated string = DbusInterfaceItem + ".Created"
+
+	// DbusItemModified is the time an Item was last modified (in a UNIX Epoch uint64) for Item.Modified.
+	DbusItemModified string = DbusInterfaceItem + ".Modified"
 )
 
 // Dbus paths.
@@ -137,3 +157,73 @@ const (
 	// DbusPromptPrefix is the path used for prompts comparison.
 	DbusPromptPrefix string = DbusPath + "/prompt/"
 )
+
+// FLAGS
+// These are not currently used, but may be in the future.
+
+// SERVICE
+
+// ServiceInitFlag is a flag for Service.Open.
+type ServiceInitFlag int
+
+const (
+	FlagServiceNone ServiceInitFlag = iota
+	FlagServiceOpenSession
+	FlagServiceLoadCollections
+)
+
+// ServiceSearchFlag is a flag for Service.SearchItems.
+type ServiceSearchFlag int
+
+const (
+	FlagServiceSearchNone ServiceSearchFlag = iota
+	FlagServiceSearchAll
+	FlagServiceSearchUnlock
+	FlagServiceSearchLoadSecrets
+)
+
+// COLLECTION
+
+// CollectionInitFlag is a flag for Collection.SearchItems and Collection.Items.
+type CollectionInitFlag int
+
+const (
+	FlagCollectionNone CollectionInitFlag = iota
+	FlagCollectionLoadItems
+)
+
+// ITEM
+
+// ItemInitFlag are flags for Collection.SearchItems and Collection.Items.
+type ItemInitFlag int
+
+const (
+	FlagItemNone ItemInitFlag = iota
+	FlagItemLoadSecret
+)
+
+// ItemSearchFlag are flags for Collection.CreateItem.
+type ItemSearchFlag int
+
+const (
+	FlagItemCreateNone ItemSearchFlag = iota
+	FlatItemCreateReplace
+)
+
+// ERRORS
+
+/*
+	SecretServiceErrEnum are just constants for the enum'd errors;
+	see SecretServiceError type and ErrSecretService* vars for what
+	actually gets returned.
+	They're used for finding the appropriate matching error.
+*/
+type SecretServiceErrEnum int
+
+const (
+	EnumErrProtocol SecretServiceErrEnum = iota
+	EnumErrIsLocked
+	EnumErrNoSuchObject
+	EnumErrAlreadyExists
+	EnumErrInvalidFileFormat
+)
diff --git a/errs.go b/errs.go
index 6753ca9..e685895 100644
--- a/errs.go
+++ b/errs.go
@@ -1,15 +1,67 @@
 package gosecret
 
 import (
-	`errors`
+	"errors"
 )
 
-// Errors.
+// General errors.
 var (
 	// ErrBadDbusPath indicates an invalid path - either nothing exists at that path or the path is malformed.
 	ErrBadDbusPath error = errors.New("invalid dbus path")
 	// ErrInvalidProperty indicates a dbus.Variant is not the "real" type expected.
 	ErrInvalidProperty error = errors.New("invalid variant type; cannot convert")
 	// ErrNoDbusConn gets triggered if a connection to Dbus can't be detected.
-	ErrNoDbusConn  error = errors.New("no valid dbus connection")
+	ErrNoDbusConn error = errors.New("no valid dbus connection")
+)
+
+/*
+	Translated SecretService errors.
+	See https://developer-old.gnome.org/libsecret/unstable/libsecret-SecretError.html#SecretError.
+	Used by TranslateError.
+*/
+var (
+	ErrUnknownSecretServiceErr error              = errors.New("cannot find matching SecretService error")
+	ErrSecretServiceProto      SecretServiceError = SecretServiceError{
+		ErrCode: EnumErrProtocol,
+		ErrName: "SECRET_ERROR_PROTOCOL",
+		ErrDesc: "an invalid message or data was received from SecretService",
+	}
+	ErrSecretServiceLocked SecretServiceError = SecretServiceError{
+		ErrCode: EnumErrIsLocked,
+		ErrName: "SECRET_ERROR_IS_LOCKED",
+		ErrDesc: "the item/collection is locked; the specified operation cannot be performed",
+	}
+	ErrSecretServiceNoObj SecretServiceError = SecretServiceError{
+		ErrCode: EnumErrNoSuchObject,
+		ErrName: "SECRET_ERROR_NO_SUCH_OBJECT",
+		ErrDesc: "no such item/collection was found in SecretService",
+	}
+	ErrSecretServiceExists SecretServiceError = SecretServiceError{
+		ErrCode: EnumErrAlreadyExists,
+		ErrName: "SECRET_ERROR_ALREADY_EXISTS",
+		ErrDesc: "a relevant item/collection already exists",
+	}
+	ErrSecretServiceInvalidFormat SecretServiceError = SecretServiceError{
+		ErrCode: EnumErrInvalidFileFormat,
+		ErrName: "SECRET_ERROR_INVALID_FILE_FORMAT",
+		ErrDesc: "the file/content format is invalid",
+	}
+	/*
+		AllSecretServiceErrs provides a slice of these for easier iteration when translating.
+		TECHNICALLY, because they are indexed in the order of their enums, you could
+		simplify and optimize translation by just doing e.g.
+
+			err = AllSecretServiceErrs[EnumErrProtocol]
+
+		But this should be considered UNSTABLE and UNSAFE due to it being potentially unpredictable in the future.
+		There are only 5 errors currently, so the performance benefits would be negligible compared to iteration.
+		If SecretService adds more errors, however, this may be more desirable.
+	*/
+	AllSecretServiceErrs []SecretServiceError = []SecretServiceError{
+		ErrSecretServiceProto,
+		ErrSecretServiceLocked,
+		ErrSecretServiceNoObj,
+		ErrSecretServiceExists,
+		ErrSecretServiceInvalidFormat,
+	}
 )
diff --git a/service_funcs.go b/service_funcs.go
index 1c39cbc..af5e2c0 100644
--- a/service_funcs.go
+++ b/service_funcs.go
@@ -1,42 +1,39 @@
 package gosecret
 
 import (
-	`github.com/godbus/dbus`
+	"github.com/godbus/dbus"
 )
 
-// NewService returns a pointer to a new Service.
+// NewService returns a pointer to a new Service connection.
 func NewService() (service *Service, err error) {
 
-	service = &Service{
-		Conn: nil,
-		Dbus: nil,
-	}
+	var svc Service = Service{}
 
-	if service.Conn, err = dbus.SessionBus(); err != nil {
+	if svc.Conn, err = dbus.SessionBus(); err != nil {
 		return
 	}
-	service.Dbus = service.Conn.Object(DbusService, dbus.ObjectPath(DbusPath))
+	svc.Dbus = service.Conn.Object(DbusService, dbus.ObjectPath(DbusPath))
 
-	return
-}
+	if svc.Session, err = svc.Open(); err != nil {
+		return
+	}
 
-// Path returns the path of the underlying Dbus connection.
-func (s Service) Path() (path dbus.ObjectPath) {
-
-	// Remove this method in V1. It's bloat since we now have an exported Dbus.
-	path = s.Dbus.Path()
+	service = &svc
 
 	return
 }
 
 // Open returns a pointer to a Session from the Service.
-func (s *Service) Open() (session *Session, err error) {
+func (s *Service) Open() (session *Session, output dbus.Variant, err error) {
 
-	var output dbus.Variant
 	var path dbus.ObjectPath
 
+	// In *theory*, SecretService supports multiple "algorithms" for encryption in-transit, but I don't think it's implemented (yet)?
+	// TODO: confirm this.
+	// Possible flags are dbus.Flags consts: https://pkg.go.dev/github.com/godbus/dbus#Flags
+	// Oddly, there is no "None" flag. So it's explicitly specified as a null byte.
 	if err = s.Dbus.Call(
-		"org.freedesktop.Secret.Service.OpenSession", 0, "plain", dbus.MakeVariant(""),
+		DbusServiceOpenSession, 0x0, "plain", dbus.MakeVariant(""),
 	).Store(&output, &path); err != nil {
 		return
 	}
@@ -46,7 +43,7 @@ func (s *Service) Open() (session *Session, err error) {
 	return
 }
 
-// Collections returns a slice of Collection keyrings accessible to this Service.
+// Collections returns a slice of Collection items accessible to this Service.
 func (s *Service) Collections() (collections []Collection, err error) {
 
 	var paths []dbus.ObjectPath
@@ -67,7 +64,7 @@ func (s *Service) Collections() (collections []Collection, err error) {
 	return
 }
 
-// CreateCollection creates a new Collection (keyring) via a Service with the name specified by label.
+// CreateCollection creates a new Collection (keyring) via a Service with the name specified by label and returns the new Collection.
 func (s *Service) CreateCollection(label string) (collection *Collection, err error) {
 
 	var variant *dbus.Variant
diff --git a/service_funcs.go.old b/service_funcs.go.old
new file mode 100644
index 0000000..c8b25b0
--- /dev/null
+++ b/service_funcs.go.old
@@ -0,0 +1,147 @@
+package gosecret
+
+import (
+	`github.com/godbus/dbus`
+)
+
+// NewService returns a pointer to a new Service.
+func NewService() (service *Service, err error) {
+
+	service = &Service{
+		Conn: nil,
+		Dbus: nil,
+	}
+
+	if service.Conn, err = dbus.SessionBus(); err != nil {
+		return
+	}
+	service.Dbus = service.Conn.Object(DbusService, dbus.ObjectPath(DbusPath))
+
+	return
+}
+
+// Path returns the path of the underlying Dbus connection.
+func (s *Service) Path() (path dbus.ObjectPath) {
+
+	// Remove this method in V1. It's bloat since we now have an exported Dbus.
+	path = s.Dbus.Path()
+
+	return
+}
+
+// Open returns a pointer to a Session from the Service.
+func (s *Service) Open() (session *Session, err error) {
+
+	var output dbus.Variant
+	var path dbus.ObjectPath
+
+	if err = s.Dbus.Call(
+		"org.freedesktop.Secret.Service.OpenSession", 0, "plain", dbus.MakeVariant(""),
+	).Store(&output, &path); err != nil {
+		return
+	}
+
+	session = NewSession(s.Conn, path)
+
+	return
+}
+
+// Collections returns a slice of Collection keyrings accessible to this Service.
+func (s *Service) Collections() (collections []Collection, err error) {
+
+	var paths []dbus.ObjectPath
+	var variant dbus.Variant
+
+	if variant, err = s.Dbus.GetProperty("org.freedesktop.Secret.Service.Collections"); err != nil {
+		return
+	}
+
+	paths = variant.Value().([]dbus.ObjectPath)
+
+	collections = make([]Collection, len(paths))
+
+	for idx, path := range paths {
+		collections[idx] = *NewCollection(s.Conn, path)
+	}
+
+	return
+}
+
+// CreateCollection creates a new Collection (keyring) via a Service with the name specified by label.
+func (s *Service) CreateCollection(label string) (collection *Collection, err error) {
+
+	var variant *dbus.Variant
+	var path dbus.ObjectPath
+	var promptPath dbus.ObjectPath
+	var prompt *Prompt
+	var props map[string]dbus.Variant = make(map[string]dbus.Variant)
+
+	props["org.freedesktop.Secret.Collection.Label"] = dbus.MakeVariant(label)
+
+	if err = s.Dbus.Call("org.freedesktop.Secret.Service.CreateCollection", 0, props, "").Store(&path, &promptPath); err != nil {
+		return
+	}
+
+	if isPrompt(promptPath) {
+
+		prompt = NewPrompt(s.Conn, promptPath)
+
+		if variant, err = prompt.Prompt(); err != nil {
+			return
+		}
+
+		path = variant.Value().(dbus.ObjectPath)
+	}
+
+	collection = NewCollection(s.Conn, path)
+
+	return
+}
+
+// Unlock unlocks a Locked Service.
+func (s *Service) Unlock(object DBusObject) (err error) {
+
+	var unlocked []dbus.ObjectPath
+	var prompt *Prompt
+	var promptPath dbus.ObjectPath
+	var paths []dbus.ObjectPath = []dbus.ObjectPath{object.Path()}
+
+	if err = s.Dbus.Call("org.freedesktop.Secret.Service.Unlock", 0, paths).Store(&unlocked, &promptPath); err != nil {
+		return
+	}
+
+	if isPrompt(promptPath) {
+
+		prompt = NewPrompt(s.Conn, promptPath)
+
+		if _, err = prompt.Prompt(); err != nil {
+			return
+		}
+	}
+
+	return
+}
+
+// Lock locks an Unlocked Service.
+func (s *Service) Lock(object DBusObject) (err error) {
+
+	var locked []dbus.ObjectPath
+	var prompt *Prompt
+	var promptPath dbus.ObjectPath
+	var paths []dbus.ObjectPath = []dbus.ObjectPath{object.Path()}
+
+	if err = s.Dbus.Call("org.freedesktop.Secret.Service.Lock", 0, paths).Store(&locked, &promptPath); err != nil {
+		return
+	}
+
+	if isPrompt(promptPath) {
+
+		prompt = NewPrompt(s.Conn, promptPath)
+
+		if _, err = prompt.Prompt(); err != nil {
+			return
+		}
+	}
+
+	return
+}
diff --git a/sserror_funcs.go b/sserror_funcs.go
new file mode 100644
index 0000000..ab0d80a
--- /dev/null
+++ b/sserror_funcs.go
@@ -0,0 +1,28 @@
+package gosecret
+
+/*
+	TranslateError translates a SecretServiceErrEnum into a SecretServiceError.
+	If a matching error was found, ok will be true and err will be the matching SecretServiceError.
+	If no matching error was found, however, then ok will be false and err will be ErrUnknownSecretServiceErr.
+*/
+func TranslateError(ssErr SecretServiceErrEnum) (ok bool, err error) {
+
+	err = ErrUnknownSecretServiceErr
+
+	for _, e := range AllSecretServiceErrs {
+		if e.ErrCode == ssErr {
+			ok = true
+			err = e
+			return
+		}
+	}
+
+	return
+}
+
+func (e SecretServiceError) Error() (errStr string) {
+
+	errStr = e.ErrDesc
+
+	return
+}
diff --git a/types.go b/types.go
index d1dc6a7..c8a14a1 100644
--- a/types.go
+++ b/types.go
@@ -1,9 +1,9 @@
 package gosecret
 
 import (
-	`time`
+	"time"
 
-	`github.com/godbus/dbus`
+	"github.com/godbus/dbus"
 )
 
 /*
@@ -11,22 +11,70 @@ import (
 */
 type MultiError struct {
 	// Errors is a slice of errors to combine/concatenate when .Error() is called.
-	Errors []error
+	Errors []error `json:"errors"`
 	// ErrorSep is a string to use to separate errors for .Error(). The default is "\n".
-	ErrorSep string
+	ErrorSep string `json:"separator"`
+}
+
+/*
+	SecretServiceError is a translated error from SecretService API.
+	See https://developer-old.gnome.org/libsecret/unstable/libsecret-SecretError.html#SecretError and
+	ErrSecretService* errors.
+*/
+type SecretServiceError struct {
+	// ErrCode is the SecretService API's enum value.
+	ErrCode SecretServiceErrEnum `json:"code"`
+	// ErrName is the SecretService API's error name.
+	ErrName string `json:"name"`
+	/*
+		ErrDesc is the actual error description/text.
+		This is what should be displayed to users, and is returned by SecretServiceError.Error.
+	*/
+	ErrDesc string `json:"desc"`
 }
 
 // ConnPathCheckResult contains the result of validConnPath.
 type ConnPathCheckResult struct {
 	// ConnOK is true if the dbus.Conn is valid.
-	ConnOK bool
+	ConnOK bool `json:"conn"`
 	// PathOK is true if the Dbus path given is a valid type and value.
-	PathOK bool
+	PathOK bool `json:"path"`
 }
 
-// DBusObject is any type that has a Path method that returns a dbus.ObjectPath.
-type DBusObject interface {
-	Path() dbus.ObjectPath
+// DbusObject is a base struct type to be anonymized by other types.
+type DbusObject struct {
+	// Conn is an active connection to the Dbus.
+	Conn *dbus.Conn `json:"-"`
+	// Dbus is the Dbus bus object.
+	Dbus dbus.BusObject `json:"-"`
+}
+
+/*
+	Prompt is an interface to handling unlocking prompts.
+	https://developer-old.gnome.org/libsecret/0.18/SecretPrompt.html
+	https://specifications.freedesktop.org/secret-service/latest/ch09.html
+*/
+type Prompt struct {
+	*DbusObject
+}
+
+/*
+	Service is a general SecretService interface, sort of handler for Dbus - it's used for fetching a Session, Collections, etc.
+	https://developer-old.gnome.org/libsecret/0.18/SecretService.html
+	https://specifications.freedesktop.org/secret-service/latest/re01.html
+*/
+type Service struct {
+	*DbusObject
+	Session *Session `json:"-"`
+}
+
+/*
+	Session is a session/instance/connection to SecretService.
+	https://developer-old.gnome.org/libsecret/0.18/SecretService.html
+	https://specifications.freedesktop.org/secret-service/latest/ch06.html
+*/
+type Session struct {
+	*DbusObject
 }
 
 /*
@@ -36,10 +84,7 @@ type DBusObject interface {
 	https://specifications.freedesktop.org/secret-service/latest/ch03.html
 */
 type Collection struct {
-	// Conn is an active connection to the Dbus.
-	Conn *dbus.Conn
-	// Dbus is the Dbus bus object.
-	Dbus dbus.BusObject
+	*DbusObject
 	// lastModified is unexported because it's important that API users don't change it; it's used by Collection.Modified.
 	lastModified time.Time
 }
@@ -50,22 +95,7 @@ type Collection struct {
 	https://specifications.freedesktop.org/secret-service/latest/re03.html
 */
 type Item struct {
-	// Conn is an active connection to the Dbus.
-	Conn *dbus.Conn
-	// Dbus is the Dbus bus object.
-	Dbus dbus.BusObject
-}
-
-/*
-	Prompt is an interface to handling unlocking prompts.
-	https://developer-old.gnome.org/libsecret/0.18/SecretPrompt.html
-	https://specifications.freedesktop.org/secret-service/latest/ch09.html
-*/
-type Prompt struct {
-	// Conn is an active connection to the Dbus.
-	Conn *dbus.Conn
-	// Dbus is the Dbus bus object.
-	Dbus dbus.BusObject
+	*DbusObject
 }
 
 /*
@@ -76,35 +106,11 @@ type Prompt struct {
 */
 type Secret struct {
 	// Session is a Dbus object path for the associated Session.
-	Session dbus.ObjectPath
+	Session dbus.ObjectPath `json:"-"`
 	// Parameters are "algorithm dependent parameters for secret value encoding" - likely this will just be an empty byteslice.
-	Parameters []byte
+	Parameters []byte `json:"params"`
 	// Value is the secret's content in []byte format.
-	Value []byte
+	Value []byte `json:"value"`
 	// ContentType is the MIME type of Value.
-	ContentType string
-}
-
-/*
-	Service is a general SecretService interface, sort of handler for Dbus - it's used for fetching a Session, Collections, etc.
-	https://developer-old.gnome.org/libsecret/0.18/SecretService.html
-	https://specifications.freedesktop.org/secret-service/latest/re01.html
-*/
-type Service struct {
-	// Conn is an active connection to the Dbus.
-	Conn *dbus.Conn
-	// Dbus is the Dbus bus object.
-	Dbus dbus.BusObject
-}
-
-/*
-	Session is a session/instance/connection to SecretService.
-	https://developer-old.gnome.org/libsecret/0.18/SecretService.html
-	https://specifications.freedesktop.org/secret-service/latest/ch06.html
-*/
-type Session struct {
-	// Conn is an active connection to the Dbus.
-	Conn *dbus.Conn
-	// Dbus is the Dbus bus object.
-	Dbus dbus.BusObject
+	ContentType string `json:"content_type"`
 }