type Lang = class(OpenXmlElement)
public
    function Create();overload;
    function Create(_node: XmlNode);overload;
    function Create(_parent: tslobj; _prefix: string; _local_name: string);overload;
    function Init();override;
    function InitAttributes();override;
    function InitChildren();override;
    function InitNode(_node: XmlNode);override;
    function Copy(_obj: Lang);override;

    property Val read ReadXmlAttrVal write WriteXmlAttrVal;
    property EastAsia read ReadXmlAttrEastAsia write WriteXmlAttrEastAsia;
    property Bidi read ReadXmlAttrBidi write WriteXmlAttrBidi;
    function ReadXmlAttrVal();
    function WriteXmlAttrVal(_value);
    function ReadXmlAttrEastAsia();
    function WriteXmlAttrEastAsia(_value);
    function ReadXmlAttrBidi();
    function WriteXmlAttrBidi(_value);

public
    //  Attributes
    XmlAttrVal: OpenXmlAttribute;
    XmlAttrEastAsia: OpenXmlAttribute;
    XmlAttrBidi: OpenXmlAttribute;

    // Children

end;

function Lang.Create();overload;
begin
    self.Create(nil, "w", "lang");
end;

function Lang.Create(_node: XmlNode);overload;
begin
    class(OpenXmlElement).Create(_node: XmlNode);
end;

function Lang.Create(_parent: tslobj; _prefix: string; _local_name: string);overload;
begin
    class(OpenXmlElement).Create(_parent, _prefix, _local_name);
end;

function Lang.Init();override;
begin
    self.XmlAttrVal := new OpenXmlAttribute(self.Prefix, "val", nil);
    self.XmlAttrEastAsia := new OpenXmlAttribute(self.Prefix, "eastAsia", nil);
    self.XmlAttrBidi := new OpenXmlAttribute(self.Prefix, "bidi", nil);
end;

function Lang.InitAttributes();override;
begin
    attributes_ := array(
        self.XmlAttrVal,
        self.XmlAttrEastAsia,
        self.XmlAttrBidi,
    );
end;

function Lang.InitChildren();override;
begin
    child_elements_ := array(
    );
    sorted_child_ := array(
        "": -1,
    );
end;

function Lang.InitNode(_node: XmlNode);override;
begin
    if ifObj(self.XmlNode) then
        for k,v in child_elements_ do v.InitNode(nil);
    self.XmlNode := ifObj(_node) ? _node : nil;
end;

function Lang.Copy(_obj: Lang);override;
begin
    if not ifnil(_obj.XmlAttrVal.Value) then
        self.XmlAttrVal.Value := _obj.XmlAttrVal.Value;
    if not ifnil(_obj.XmlAttrEastAsia.Value) then
        self.XmlAttrEastAsia.Value := _obj.XmlAttrEastAsia.Value;
    if not ifnil(_obj.XmlAttrBidi.Value) then
        self.XmlAttrBidi.Value := _obj.XmlAttrBidi.Value;
end;

function Lang.ReadXmlAttrVal();
begin
    return self.XmlAttrVal.Value;
end;

function Lang.WriteXmlAttrVal(_value);
begin
    self.XmlAttrVal.Value := _value;
end;

function Lang.ReadXmlAttrEastAsia();
begin
    return self.XmlAttrEastAsia.Value;
end;

function Lang.WriteXmlAttrEastAsia(_value);
begin
    self.XmlAttrEastAsia.Value := _value;
end;

function Lang.ReadXmlAttrBidi();
begin
    return self.XmlAttrBidi.Value;
end;

function Lang.WriteXmlAttrBidi(_value);
begin
    self.XmlAttrBidi.Value := _value;
end;