diff --git a/configuration.go b/configuration.go
index d35aa1ae..09843f68 100644
--- a/configuration.go
+++ b/configuration.go
@@ -1,18 +1,31 @@
 package mdclasses
 
 import (
-	"encoding/xml"
 	"github.com/khorevaa/logos"
+	"github.com/v8platform/mdclasses/encoding/xml"
 )
 
 var log = logos.New("github.com/v8platform/mdclasses").Sugar()
 
+type Mdclass struct {
+	xml.Name
+	value string
+}
+
+type Name struct {
+	xml.Name
+	value string
+}
+
 type Configuration struct {
-	XMLName          xml.Name     `xml:"Configuration"`
-	Mdclass          string       `xml:"mdclass,attr"`
-	Uuid             string       `xml:"uuid,attr"`
-	Name             string       `xml:"name"`
-	Synonym          ValueTypeRef `xml:"synonym"`
+	XMLName xml.Name `xml:"mdclass Configuration"`
+	Mdclass xml.Attr `xml:"mdclass,attr"`
+	Uuid    string   `xml:"uuid,attr"`
+	Name    string   `xml:"name"`
+	Synonym struct {
+		Key   string `xml:"key"`
+		Value string `xml:"value"`
+	} `xml:"synonym"`
 	ContainedObjects []struct {
 		ClassId  string `xml:"classId,attr,allowempty"`
 		ObjectId string `xml:"objectId,attr,allowempty"`
@@ -114,6 +127,44 @@ type Configuration struct {
 	Tasks                       []string  `xml:"tasks"`
 }
 
+const ConfigurationFile = "Configuration.mdo"
+
+func (conf *Name) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	panic("implement me")
+}
+
+func (conf *Mdclass) MarshalXMLAttr(name xml.Name) (xml.Attr, error) {
+	//pp.Println(name)
+	return xml.Attr{
+		conf.Name,
+		conf.value,
+	}, nil
+}
+
+func (conf *Mdclass) UnmarshalXMLAttr(attr xml.Attr) error {
+
+	conf.Name = attr.Name
+	conf.value = attr.Value
+
+	return nil
+}
+
+func (conf *Name) MarshalXMLAttr(name xml.Name) (xml.Attr, error) {
+	//pp.Println(name)
+	return xml.Attr{
+		conf.Name,
+		conf.value,
+	}, nil
+}
+
+func (conf *Name) UnmarshalXMLAttr(attr xml.Attr) error {
+
+	conf.Name = attr.Name
+	conf.value = attr.Value
+
+	return nil
+}
+
 func (conf *Configuration) Unpack(cfg UnpackConfig) error {
 
 	for _, name := range conf.SubsystemsNames {
diff --git a/encoding/xml/marshal.go b/encoding/xml/marshal.go
index e831b575..2e4bc360 100644
--- a/encoding/xml/marshal.go
+++ b/encoding/xml/marshal.go
@@ -353,7 +353,8 @@ func (p *printer) createAttrPrefix(url string) string {
 	//    (('X'|'x') ('M'|'m') ('L'|'l'))
 	// See Section 2.3 of https://www.w3.org/TR/REC-xml/
 	if len(prefix) >= 3 && strings.EqualFold(prefix[:3], "xml") {
-		prefix = "_" + prefix
+		// prefix = "_" + prefix
+		return prefix
 	}
 	if p.attrNS[prefix] != "" {
 		// Name is taken. Find a better one.
@@ -722,13 +723,12 @@ func (p *printer) writeStart(start *StartElement, selfClosing bool) error {
 	}
 
 	p.WriteByte('<')
-	p.WriteString(start.Name.Local)
 
 	if start.Name.Space != "" {
-		p.WriteString(` xmlns="`)
 		p.EscapeString(start.Name.Space)
-		p.WriteByte('"')
+		p.WriteByte(':')
 	}
+	p.WriteString(start.Name.Local)
 
 	// Attributes
 	for _, attr := range start.Attr {
@@ -772,7 +772,13 @@ func (p *printer) writeEnd(name Name) error {
 	p.writeIndent(-1)
 	p.WriteByte('<')
 	p.WriteByte('/')
+	if name.Space != "" {
+		p.EscapeString(name.Space)
+		p.WriteByte(':')
+	}
+
 	p.WriteString(name.Local)
+
 	p.WriteByte('>')
 	p.popPrefix()
 	return nil
diff --git a/encoding/xml/xml.go b/encoding/xml/xml.go
index cc055f64..ff5d9ace 100644
--- a/encoding/xml/xml.go
+++ b/encoding/xml/xml.go
@@ -359,9 +359,10 @@ func (d *Decoder) translate(n *Name, isElementName bool) {
 	case n.Space == "" && n.Local == xmlnsPrefix:
 		return
 	}
-	if v, ok := d.ns[n.Space]; ok {
-		n.Space = v
-	} else if n.Space == "" {
+	// if v, ok := d.ns[n.Space]; ok {
+	// 	n.Space = v
+	// } else
+	if n.Space == "" {
 		n.Space = d.DefaultSpace
 	}
 }
diff --git a/go.mod b/go.mod
index 94c0c8f7..ccb09c02 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,10 @@ module github.com/v8platform/mdclasses
 go 1.16
 
 require (
-	github.com/khorevaa/logos v0.9.8
+	github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 // indirect
+	github.com/k0kubun/pp v3.0.1+incompatible
+	github.com/mattn/go-colorable v0.1.8 // indirect
 	github.com/pkg/errors v0.9.1
+	github.com/khorevaa/logos v0.9.8
+
 )
diff --git a/go.sum b/go.sum
index 6c94e563..10aa710d 100644
--- a/go.sum
+++ b/go.sum
@@ -19,8 +19,19 @@ github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope
 github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
 github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 h1:uC1QfSlInpQF+M0ao65imhwqKnz3Q2z/d8PWZRMQvDM=
+github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88/go.mod h1:3w7q1U84EfirKl04SVQ/s7nPm1ZPhiXd34z40TNz36k=
+github.com/k0kubun/pp v3.0.1+incompatible h1:3tqvf7QgUnZ5tXO6pNAZlrvHgl6DvifjDrd9g2S9Z40=
+github.com/k0kubun/pp v3.0.1+incompatible/go.mod h1:GWse8YhT0p8pT4ir3ZgBbfZild3tgzSScAn6HmfYukg=
+github.com/mattn/go-colorable v0.1.8 h1:c1ghPdyEDarC70ftn0y+A/Ee++9zz8ljHG1b13eJ0s8=
+github.com/mattn/go-colorable v0.1.8/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
diff --git a/mdclasses.go b/mdclasses.go
index caa1a7bc..cef6b040 100644
--- a/mdclasses.go
+++ b/mdclasses.go
@@ -1,5 +1,10 @@
 package mdclasses
 
+import (
+	"fmt"
+	"github.com/v8platform/mdclasses/encoding/xml"
+)
+
 func UnpackConfiguration(dir string) (Configuration, error) {
 
 	cfg := NewUnpackConfig("Configuration", dir)
@@ -10,6 +15,13 @@ func UnpackConfiguration(dir string) (Configuration, error) {
 		return Configuration{}, err
 	}
 
+	bytes, err := xml.Marshal(conf)
+	if err != nil {
+		return Configuration{}, err
+	}
+	str := string(bytes)
+	fmt.Println(str)
+
 	return conf, nil
 
 }
diff --git a/unpack.go b/unpack.go
index d80eb541..1d2938ba 100644
--- a/unpack.go
+++ b/unpack.go
@@ -1,9 +1,9 @@
 package mdclasses
 
 import (
-	"encoding/xml"
 	"fmt"
 	"github.com/pkg/errors"
+	"github.com/v8platform/mdclasses/encoding/xml"
 	"io/ioutil"
 	"os"
 	"path/filepath"