type F = 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 Copy(_obj: F);override;

public

    // attributes property
    property Eqn read ReadXmlAttrEqn write WriteXmlAttrEqn;
    function ReadXmlAttrEqn();
    function WriteXmlAttrEqn(_value);

public
    // Attributes
    XmlAttrEqn: OpenXmlAttribute;


end;

function F.Create();overload;
begin
    {self.}Create(nil, "v", "f");
end;

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

function F.Create(_parent: tslobj; _prefix: string; _local_name: string);overload;
begin
    setsysparam(pn_calcctrlword(), getsysparam(pn_calcctrlword()) .| 0x200);
    class(OpenXmlElement).Create(_parent, _prefix, _local_name);
end;

function F.Init();override;
begin
    pre := {self.}Prefix ? {self.}Prefix + ":" : "";
    attributes_ := array();
    attributes_pf_ := array(
        "eqn": makeweakref(thisFunction(WriteXmlAttrEqn)),
    );
    sorted_child_ := array(
    );
    container_ := new TSOfficeContainer(sorted_child_);
end;

function F.Copy(_obj: F);override;
begin
    tslassigning_backup := tslassigning;
    tslassigning := 1;
    class(OpenXmlElement).Copy(_obj);
    if not ifnil(_obj.Eqn) then
        {self.}Eqn := _obj.Eqn;
    tslassigning := tslassigning_backup;
end;

function F.ReadXmlAttrEqn();
begin
    return {self.}XmlAttrEqn.Value;
end;

function F.WriteXmlAttrEqn(_value);
begin
    if ifnil({self.}XmlAttrEqn) then
    begin
        {self.}XmlAttrEqn := new OpenXmlAttribute("", "eqn", nil);
        attributes_[length(attributes_)] := {self.}XmlAttrEqn;
    end
    {self.}XmlAttrEqn.Value := _value;
end;