Simple roundtrip from ipptool works.

packages/ipp/urivalue.go

@@ -0,0 +1,42 @@
+package ipp
+
+import (
+	"io"
+)
+
+type uriValue struct {
+	name  string
+	value string
+}
+
+func newUriValue(name, value string) *uriValue {
+	u := new(uriValue)
+	u.name = name
+	u.value = value
+	return u
+}
+
+func (u uriValue) String() string {
+	return u.name + ":" + u.value
+}
+
+func (u *uriValue) valueTag() tag {
+	return uriValueTag
+}
+
+func (u *uriValue) unmarshal(byteStream io.Reader) {
+	u.name, u.value = unmarshalSingleValue(byteStream)
+}
+
+func (u *uriValue) marshal() []byte {
+	res := make([]byte, u.size())
+	res[0] = byte(uriValueTag)
+	marshalNameValue(u.name, u.value, res[1:])
+	return res
+}
+func (u *uriValue) size() int {
+	l := 1 + 4 // The attribute tag + 2 lengths
+	l += len(u.name)
+	l += len(u.value)
+	return l
+}