xml

value := map[string]interface{}{"-attr": "attrVal", "body": "bodyVal"}
marshaller, ok := base.Get(Format)
if !ok {
	return
}

fmt.Println(marshaller.Marshal(value, model.ContentVariable{
	Name: "example",
	Type: model.Structure,
	SubContentVariables: []model.ContentVariable{
		{Name: "-attr"},
		{Name: "body"},
	},
}))

Output:
<example attr="attrVal"><body>bodyVal</body></example> <nil>

value := true
marshaller, ok := base.Get(Format)
if !ok {
	return
}

fmt.Println(marshaller.Marshal(value, model.ContentVariable{
	Name: "b",
}))

Output:
<b>true</b> <nil>

value := 2.4
marshaller, ok := base.Get(Format)
if !ok {
	return
}

fmt.Println(marshaller.Marshal(value, model.ContentVariable{
	Name: "f",
}))

Output:
<f>2.4</f> <nil>

value := 24
marshaller, ok := base.Get(Format)
if !ok {
	return
}

fmt.Println(marshaller.Marshal(value, model.ContentVariable{
	Name: "int",
}))

Output:
<int>24</int> <nil>

value := "foo"
marshaller, ok := base.Get(Format)
if !ok {
	return
}

fmt.Println(marshaller.Marshal(value, model.ContentVariable{
	Name: "str",
}))

Output:
<str>foo</str> <nil>

value := map[string]interface{}{"attr": "attrVal", "body": "bodyVal"}
marshaller, ok := base.Get(Format)
if !ok {
	return
}

fmt.Println(marshaller.Marshal(value, model.ContentVariable{
	Name: "example",
	Type: model.Structure,
	SubContentVariables: []model.ContentVariable{
		{Name: "attr", SerializationOptions: []string{models.SerializationOptionXmlAttribute}},
		{Name: "body"},
	},
}))

Output:
<example attr="attrVal"><body>bodyVal</body></example> <nil>