type CoreProperties = 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: CoreProperties);override;

    property XmlnsCp read ReadXmlAttrXmlnsCp write WriteXmlAttrXmlnsCp;
    property XmlnsDc read ReadXmlAttrXmlnsDc write WriteXmlAttrXmlnsDc;
    property XmlnsDcterms read ReadXmlAttrXmlnsDcterms write WriteXmlAttrXmlnsDcterms;
    property XmlnsDcmitype read ReadXmlAttrXmlnsDcmitype write WriteXmlAttrXmlnsDcmitype;
    property XmlnsXsi read ReadXmlAttrXmlnsXsi write WriteXmlAttrXmlnsXsi;
    function ReadXmlAttrXmlnsCp();
    function WriteXmlAttrXmlnsCp(_value);
    function ReadXmlAttrXmlnsDc();
    function WriteXmlAttrXmlnsDc(_value);
    function ReadXmlAttrXmlnsDcterms();
    function WriteXmlAttrXmlnsDcterms(_value);
    function ReadXmlAttrXmlnsDcmitype();
    function WriteXmlAttrXmlnsDcmitype(_value);
    function ReadXmlAttrXmlnsXsi();
    function WriteXmlAttrXmlnsXsi(_value);

public
    //  Attributes
    XmlAttrXmlnsCp: OpenXmlAttribute;
    XmlAttrXmlnsDc: OpenXmlAttribute;
    XmlAttrXmlnsDcterms: OpenXmlAttribute;
    XmlAttrXmlnsDcmitype: OpenXmlAttribute;
    XmlAttrXmlnsXsi: OpenXmlAttribute;

    // Children
    Title: OpenXmlPcdata;
    Subject: OpenXmlPcdata;
    Creator: OpenXmlPcdata;
    Keywords: OpenXmlPcdata;
    Description: OpenXmlPcdata;
    LastModifiedBy: OpenXmlPcdata;
    Revision: OpenXmlPcdata;
    LastPrinted: OpenXmlPcdata;
    Created: OpenXmlPcdata;
    Modified: OpenXmlPcdata;

end;

function CoreProperties.Create();overload;
begin
    self.Create(nil, "cp", "coreProperties");
end;

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

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

function CoreProperties.Init();override;
begin
    self.XmlAttrXmlnsCp := new OpenXmlAttribute("xmlns", "cp", "http://schemas.openxmlformats.org/package/2006/metadata/core-properties");
    self.XmlAttrXmlnsDc := new OpenXmlAttribute("xmlns", "dc", "http://purl.org/dc/elements/1.1/");
    self.XmlAttrXmlnsDcterms := new OpenXmlAttribute("xmlns", "dcterms", "http://purl.org/dc/terms/");
    self.XmlAttrXmlnsDcmitype := new OpenXmlAttribute("xmlns", "dcmitype", "http://purl.org/dc/dcmitype/");
    self.XmlAttrXmlnsXsi := new OpenXmlAttribute("xmlns", "xsi", "http://www.w3.org/2001/XMLSchema-instance");
    self.Title := new OpenXmlPcdata(self, "dc", "title");
    self.Subject := new OpenXmlPcdata(self, "dc", "subject");
    self.Creator := new OpenXmlPcdata(self, "dc", "creator");
    self.Keywords := new OpenXmlPcdata(self, "cp", "keywords");
    self.Description := new OpenXmlPcdata(self, "cp", "description");
    self.LastModifiedBy := new OpenXmlPcdata(self, "cp", "lastModifiedBy");
    self.Revision := new OpenXmlPcdata(self, "cp", "revision");
    self.LastPrinted := new OpenXmlPcdata(self, "cp", "lastPrinted");
    self.Created := new Created(self, "dcterms", "created");
    self.Modified := new Modified(self, "dcterms", "modified");
end;

function CoreProperties.InitAttributes();override;
begin
    attributes_ := array(
        self.XmlAttrXmlnsCp,
        self.XmlAttrXmlnsDc,
        self.XmlAttrXmlnsDcterms,
        self.XmlAttrXmlnsDcmitype,
        self.XmlAttrXmlnsXsi,
    );
end;

function CoreProperties.InitChildren();override;
begin
    child_elements_ := array(
        0: self.Title,
        1: self.Subject,
        2: self.Creator,
        3: self.Keywords,
        4: self.Description,
        5: self.LastModifiedBy,
        6: self.Revision,
        7: self.LastPrinted,
        8: self.Created,
        9: self.Modified,
    );
    sorted_child_ := array(
        "": -1,
        self.Title.ElementName: 0,
        self.Subject.ElementName: 1,
        self.Creator.ElementName: 2,
        self.Keywords.ElementName: 3,
        self.Description.ElementName: 4,
        self.LastModifiedBy.ElementName: 5,
        self.Revision.ElementName: 6,
        self.LastPrinted.ElementName: 7,
        self.Created.ElementName: 8,
        self.Modified.ElementName: 9,
    );
end;

function CoreProperties.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;
    node := ifObj(_node) ? _node.FirstChild() : nil;
    flag := false;
    if ifnil(child_elements_[0]) and length(child_elements_) > 0 then
    begin
        flag := true;
        arr := child_elements_;
        child_elements_ := array();
    end
    pre := ifString(self.Prefix) ? self.Prefix + ":" : "";
    while ifObj(node) do
    begin
        node_name := node.GetName();
        pos := sorted_child_[node_name];
        if ifnil(pos) or pos = -1 then
        begin
            obj := nil;
            case node_name of
            end;
            if ifObj(obj) then obj.InitNode(node);
        end
        else if flag then
        begin
            obj := arr[pos];
            obj.InitNode(node);
            child_elements_[length(child_elements_)] := obj;
        end
        else begin
            child_elements_[pos].InitNode(node);
        end
        node := node.NextElement();
    end
end;

function CoreProperties.Copy(_obj: CoreProperties);override;
begin
    if not ifnil(_obj.XmlAttrXmlnsCp.Value) then
        self.XmlAttrXmlnsCp.Value := _obj.XmlAttrXmlnsCp.Value;
    if not ifnil(_obj.XmlAttrXmlnsDc.Value) then
        self.XmlAttrXmlnsDc.Value := _obj.XmlAttrXmlnsDc.Value;
    if not ifnil(_obj.XmlAttrXmlnsDcterms.Value) then
        self.XmlAttrXmlnsDcterms.Value := _obj.XmlAttrXmlnsDcterms.Value;
    if not ifnil(_obj.XmlAttrXmlnsDcmitype.Value) then
        self.XmlAttrXmlnsDcmitype.Value := _obj.XmlAttrXmlnsDcmitype.Value;
    if not ifnil(_obj.XmlAttrXmlnsXsi.Value) then
        self.XmlAttrXmlnsXsi.Value := _obj.XmlAttrXmlnsXsi.Value;
    self.Title.Copy(_obj.Title);
    self.Subject.Copy(_obj.Subject);
    self.Creator.Copy(_obj.Creator);
    self.Keywords.Copy(_obj.Keywords);
    self.Description.Copy(_obj.Description);
    self.LastModifiedBy.Copy(_obj.LastModifiedBy);
    self.Revision.Copy(_obj.Revision);
    self.LastPrinted.Copy(_obj.LastPrinted);
    self.Created.Copy(_obj.Created);
    self.Modified.Copy(_obj.Modified);
end;

function CoreProperties.ReadXmlAttrXmlnsCp();
begin
    return self.XmlAttrXmlnsCp.Value;
end;

function CoreProperties.WriteXmlAttrXmlnsCp(_value);
begin
    self.XmlAttrXmlnsCp.Value := _value;
end;

function CoreProperties.ReadXmlAttrXmlnsDc();
begin
    return self.XmlAttrXmlnsDc.Value;
end;

function CoreProperties.WriteXmlAttrXmlnsDc(_value);
begin
    self.XmlAttrXmlnsDc.Value := _value;
end;

function CoreProperties.ReadXmlAttrXmlnsDcterms();
begin
    return self.XmlAttrXmlnsDcterms.Value;
end;

function CoreProperties.WriteXmlAttrXmlnsDcterms(_value);
begin
    self.XmlAttrXmlnsDcterms.Value := _value;
end;

function CoreProperties.ReadXmlAttrXmlnsDcmitype();
begin
    return self.XmlAttrXmlnsDcmitype.Value;
end;

function CoreProperties.WriteXmlAttrXmlnsDcmitype(_value);
begin
    self.XmlAttrXmlnsDcmitype.Value := _value;
end;

function CoreProperties.ReadXmlAttrXmlnsXsi();
begin
    return self.XmlAttrXmlnsXsi.Value;
end;

function CoreProperties.WriteXmlAttrXmlnsXsi(_value);
begin
    self.XmlAttrXmlnsXsi.Value := _value;
end;