diff --git a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_addon.java b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_addon.java
new file mode 100644
index 000000000..de2776bc9
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_addon.java
@@ -0,0 +1,27 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.xtns.hieros; import gplx.*; import gplx.xowa.*; import gplx.xowa.xtns.*;
+import gplx.xowa.addons.*;
+import gplx.xowa.bldrs.wkrs.*;
+public class Hiero_addon implements Xoax_addon_itm, Xoax_addon_itm__init {
+	public void Init_addon_by_app(Xoa_app app) {}
+	public void Init_addon_by_wiki(Xow_wiki wiki) {
+		Hiero_hdump_wkr hdump_wkr = new Hiero_hdump_wkr();
+		wiki.Html__hdump_mgr().Wkrs().Add(hdump_wkr.Key(), hdump_wkr);
+	}
+
+	public String Addon__key() {return "xowa.hieros";}
+}
diff --git a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_hdump_wkr.java b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_hdump_wkr.java
new file mode 100644
index 000000000..b3273bafd
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_hdump_wkr.java
@@ -0,0 +1,34 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.xtns.hieros; import gplx.*; import gplx.xowa.*; import gplx.xowa.xtns.*;
+import gplx.langs.htmls.*; import gplx.xowa.htmls.hdumps.*; import gplx.langs.htmls.docs.*; import gplx.xowa.htmls.core.wkrs.*; import gplx.xowa.htmls.core.wkrs.tags.*;
+public class Hiero_hdump_wkr implements Xoh_hdump_wkr {
+	public byte[] Key() {return KEY;}
+	public int Process(Bry_bfr bfr, Xoh_hdoc_ctx hctx, Xoh_hdoc_wkr hdoc_wkr, Gfh_tag_rdr tag_rdr, byte[] src, Gfh_tag tag) {
+		Gfh_atr atr = tag.Atrs__get_by_or_empty(Gfh_atr_.Bry__src);
+		if (atr == Gfh_atr.Noop) {
+			tag_rdr.Err_wkr().Warn("hiero tag missing src; tag=" + tag.To_str());
+			bfr.Add_mid(src, tag.Src_bgn(), tag.Src_end());
+		}
+		else {
+			Xoh_hdump_wkr_utl.Write_tag_with_val_at_atr_bgn(bfr, src, tag, atr, Hiero_xtn_mgr.Img_src_dir);
+		}
+		return tag.Src_end();
+	}
+
+	public static byte[] KEY = Bry_.new_a7("hiero-img");
+	public static byte[] HDUMP_ATR = Xoh_hdump_wkr_utl.Build_hdump_atr(KEY);
+}
diff --git a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_fxt.java b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_fxt.java
new file mode 100644
index 000000000..02e37c380
--- /dev/null
+++ b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_fxt.java
@@ -0,0 +1,115 @@
+/*
+XOWA: the XOWA Offline Wiki Application
+Copyright (C) 2012-2017 gnosygnu@gmail.com
+
+XOWA is licensed under the terms of the General Public License (GPL) Version 3,
+or alternatively under the terms of the Apache License Version 2.0.
+
+You may use XOWA according to either of these licenses as is most appropriate
+for your project on a case-by-case basis.
+
+The terms of each license can be found in the source code repository:
+
+GPLv3 License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-GPLv3.txt
+Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
+*/
+package gplx.xowa.xtns.hieros; import gplx.*; import gplx.xowa.*; import gplx.xowa.xtns.*;
+import gplx.xowa.htmls.core.htmls.*; import gplx.xowa.htmls.core.makes.tests.*;
+class Hiero_html_fxt {
+	private final    Hiero_html_mgr_fxt hiero_fxt = new Hiero_html_mgr_fxt(new Xop_fxt());
+	private final    Xoh_make_fxt make_fxt = new Xoh_make_fxt();
+	private final    Xop_fxt parser_fxt;
+	private String hdump_atr;
+	public Hiero_html_fxt() {
+		this.parser_fxt = hiero_fxt.Fxt();
+	}
+	public Hiero_html_mgr_fxt Hiero_fxt() {return hiero_fxt;}
+	public Hiero_html_fxt Hdump_n_() {return Hdump_(Bool_.N);}
+	public Hiero_html_fxt Hdump_y_() {return Hdump_(Bool_.Y);}
+	private Hiero_html_fxt Hdump_(boolean v) {
+		this.hdump_atr = v ? " " + String_.new_u8(Hiero_hdump_wkr.HDUMP_ATR) : " ";
+		return this;
+	}
+	public void Test__hview(String wtxt, String expd) {
+		parser_fxt.Hctx_(Xoh_wtr_ctx.Basic);
+		parser_fxt.Test_html_full_str(wtxt, expd);
+	}
+	public void Test__hdump(String wtxt, String save, String load) {
+		parser_fxt.Hctx_(Xoh_wtr_ctx.Hdump);
+		parser_fxt.Test_html_full_str(wtxt, save);
+		make_fxt.Test__make(save, make_fxt.Page_chkr().Body_(load));
+	}
+	public String Glyph_1__wtxt() {
+		hiero_fxt.Init_hiero_A1_B1();
+		return "<hiero>A1</hiero>";
+	}
+	public String Glyph_1__html(boolean hiero_dir_has_value) {
+		String hiero_dir = Hiero_dir(hiero_dir_has_value);
+		return String_.Concat_lines_nl
+		( "<table class='mw-hiero-table mw-hiero-outer' dir='ltr'>"
+		, "  <tr>"
+		, "    <td>"
+		, "      <table class=\"mw-hiero-table\">"
+		, "        <tr>"
+		, "          <td>"
+		, "            <img style='margin: 1px; height: 38px;' src='" + hiero_dir + "hiero_A1.png' title='A1' alt='A1'" + hdump_atr + "/>"
+		, "          </td>"
+		, "        </tr>"
+		, "      </table>"
+		, "    </td>"
+		, "  </tr>"
+		, "</table>"
+		);
+	}
+	public String Cartouche__wtxt() {
+		hiero_fxt.Init_hiero_A1_B1().Init_hiero_cartouche();
+		return "<hiero>< A1 ></hiero>";
+	}
+	public String Cartouche__html(boolean hiero_dir_has_value) {
+		String hiero_dir = Hiero_dir(hiero_dir_has_value);
+		return String_.Concat_lines_nl_skip_last
+		( "<table class='mw-hiero-table mw-hiero-outer' dir='ltr'>"
+		, "  <tr>"
+		, "    <td>"
+		, "      <table class=\"mw-hiero-table\">"
+		, "        <tr>"
+		, "          <td>"
+		, "            <img src='" + hiero_dir + "hiero_Ca1.png' height='44' title='&lt;' alt='&lt;'" + hdump_atr + "/>"
+		, "          </td>"
+		, "          <td>"
+		, "            <table class=\"mw-hiero-table\">"
+		, "              <tr>"
+		, "                <td class='mw-hiero-box' style='height: 2px;'>"
+		, "                </td>"
+		, "              </tr>"
+		, "              <tr>"
+		, "                <td>"
+		, "                  <table class=\"mw-hiero-table\">"
+		, "                    <tr>"
+		, "          <td>"
+		, "            <img style='margin: 1px; height: 38px;' src='" + hiero_dir + "hiero_A1.png' title='A1' alt='A1'" + hdump_atr + "/>"
+		, "          </td>"
+		, "                    </tr>"
+		, "                  </table>"
+		, "                </td>"
+		, "              </tr>"
+		, "              <tr>"
+		, "                <td class='mw-hiero-box' style='height: 2px;'>"
+		, "                </td>"
+		, "              </tr>"
+		, "            </table>"
+		, "          </td>"
+		, "          <td>"
+		, "            <img src='" + hiero_dir + "hiero_Ca2.png' height='44' title='&gt;' alt='&gt;'" + hdump_atr + "/>"
+		, "          </td>"
+		, "        </tr>"
+		, "      </table>"
+		, "    </td>"
+		, "  </tr>"
+		, "</table>"
+		);
+	}
+	private String Hiero_dir(boolean hiero_dir_has_value) {
+		return hiero_dir_has_value ? "file:///mem/xowa/bin/any/xowa/xtns/Wikihiero/img/" : "";
+	}
+}
diff --git a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_mgr_tst.java b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_mgr_tst.java
index f2f658f20..a37d21584 100644
--- a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_mgr_tst.java
+++ b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_mgr_tst.java
@@ -16,7 +16,12 @@ Apache License: https://github.com/gnosygnu/xowa/blob/master/LICENSE-APACHE2.txt
 package gplx.xowa.xtns.hieros; import gplx.*; import gplx.xowa.*; import gplx.xowa.xtns.*;
 import org.junit.*;
 public class Hiero_html_mgr_tst {
-	@Before public void init() {fxt.Reset();} private Hiero_html_mgr_fxt fxt = new Hiero_html_mgr_fxt(new Xop_fxt());
+	private Hiero_html_mgr_fxt fxt;
+	private final    Hiero_html_fxt html_fxt = new Hiero_html_fxt();
+	@Before public void init() {
+		fxt = html_fxt.Hiero_fxt();
+		fxt.Reset();
+	}
 	@Test   public void Empty() {
 		fxt.Test_html_full_str
 		( "<hiero></hiero>"
@@ -31,24 +36,9 @@ public class Hiero_html_mgr_tst {
 		));
 	}
 	@Test   public void Glyph_1() {
-		fxt.Init_hiero_A1_B1();
-		fxt.Test_html_full_str
-		( "<hiero>A1</hiero>"
-		, String_.Concat_lines_nl_skip_last
-		( "<table class='mw-hiero-table mw-hiero-outer' dir='ltr'>"
-		, "  <tr>"
-		, "    <td>"
-		, "      <table class=\"mw-hiero-table\">"
-		, "        <tr>"
-		, "          <td>"
-		, "            <img style='margin: 1px; height: 38px;' src='file:///mem/xowa/bin/any/xowa/xtns/Wikihiero/img/hiero_A1.png' title='A1' alt='A1' />"
-		, "          </td>"
-		, "        </tr>"
-		, "      </table>"
-		, "    </td>"
-		, "  </tr>"
-		, "</table>"
-		));
+		String wtxt = html_fxt.Glyph_1__wtxt();
+		html_fxt.Test__hview(wtxt, html_fxt.Hdump_n_().Glyph_1__html(Bool_.Y));
+		html_fxt.Test__hdump(wtxt, html_fxt.Hdump_y_().Glyph_1__html(Bool_.N), html_fxt.Glyph_1__html(Bool_.Y));
 	}
 	@Test   public void Mirrored() {
 		fxt.Init_hiero_A1_B1();
@@ -181,50 +171,9 @@ public class Hiero_html_mgr_tst {
 		));
 	}
 	@Test   public void Cartouche() {
-		fxt.Init_hiero_A1_B1().Init_hiero_cartouche();
-		fxt.Test_html_full_str
-		( "<hiero>< A1 ></hiero>"
-		, String_.Concat_lines_nl_skip_last
-		( "<table class='mw-hiero-table mw-hiero-outer' dir='ltr'>"
-		, "  <tr>"
-		, "    <td>"
-		, "      <table class=\"mw-hiero-table\">"
-		, "        <tr>"
-		, "          <td>"
-		, "            <img src='file:///mem/xowa/bin/any/xowa/xtns/Wikihiero/img/hiero_Ca1.png' height='44' title='&lt;' alt='&lt;' />"
-		, "          </td>"
-		, "          <td>"
-		, "            <table class=\"mw-hiero-table\">"
-		, "              <tr>"
-		, "                <td class='mw-hiero-box' style='height: 2px;'>"
-		, "                </td>"
-		, "              </tr>"
-		, "              <tr>"
-		, "                <td>"
-		, "                  <table class=\"mw-hiero-table\">"
-		, "                    <tr>"
-		, "          <td>"
-		, "            <img style='margin: 1px; height: 38px;' src='file:///mem/xowa/bin/any/xowa/xtns/Wikihiero/img/hiero_A1.png' title='A1' alt='A1' />"
-		, "          </td>"
-		, "                    </tr>"
-		, "                  </table>"
-		, "                </td>"
-		, "              </tr>"
-		, "              <tr>"
-		, "                <td class='mw-hiero-box' style='height: 2px;'>"
-		, "                </td>"
-		, "              </tr>"
-		, "            </table>"
-		, "          </td>"
-		, "          <td>"
-		, "            <img src='file:///mem/xowa/bin/any/xowa/xtns/Wikihiero/img/hiero_Ca2.png' height='44' title='&gt;' alt='&gt;' />"
-		, "          </td>"
-		, "        </tr>"
-		, "      </table>"
-		, "    </td>"
-		, "  </tr>"
-		, "</table>"
-		));
+		String wtxt = html_fxt.Cartouche__wtxt();
+		html_fxt.Test__hview(wtxt, html_fxt.Hdump_n_().Cartouche__html(Bool_.Y));
+		html_fxt.Test__hdump(wtxt, html_fxt.Hdump_y_().Cartouche__html(Bool_.N), html_fxt.Cartouche__html(Bool_.Y));
 	}
 	@Test   public void Superposition_regular() {
 		fxt.Init_hiero_A1_B1();
diff --git a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_wtr.java b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_wtr.java
index 7ad19248b..2290f10fd 100644
--- a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_wtr.java
+++ b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_html_wtr.java
@@ -83,14 +83,17 @@ class Hiero_html_wtr {
 		Hiero_phoneme_itm phoneme_itm = phoneme_mgr.Get_by_key(glyph); if (phoneme_itm == null) throw Err_.new_wo_type("missing phoneme", "glyph", String_.new_u8(glyph));
 		byte[] code = phoneme_itm.Gardiner_code();
 		byte[] title = bgn ? Gfh_entity_.Lt_bry : Gfh_entity_.Gt_bry;
-		return cartouche_img_fmtr.Bld_bry_many(temp_bfr, hiero_img_dir, code, height, title);
+
+		// ISSUE#:553; DATE:2019-09-25
+		byte[] img_src_dir = hiero_img_dir;
+		byte[] img_hdump_atr = Bry_.Empty;
+		if (hctx.Mode_is_hdump()) {
+			img_src_dir = Bry_.Empty;
+			img_hdump_atr = Hiero_hdump_wkr.HDUMP_ATR;
+		}
+
+		return cartouche_img_fmtr.Bld_bry_many(temp_bfr, img_src_dir, code, height, title, img_hdump_atr);
 	}
-	private static final    Bry_fmtr cartouche_img_fmtr = Bry_fmtr.new_(String_.Concat
-	( "\n            <img src='~{path}hiero_~{code}.png'"
-	, " height='~{height}' title='~{title}'"
-	, " alt='~{title}' />"
-	)
-	, "path", "code", "height", "title", "hiero_tid");
 	public void Tbl_inner(Bry_bfr html_bfr, Bry_bfr text_bfr) {
 		html_bfr.Add(Tbl_inner_bgn).Add_bfr_and_clear(text_bfr).Add(Tbl_inner_end); //	$html .= self::TABLE_START . "<tr>\n" . $tableContentHtml . '</tr></table>';
 	}
@@ -132,8 +135,14 @@ class Hiero_html_wtr {
 	}
 	public byte[] Img_file(Xoh_wtr_ctx hctx, byte[] img_cls, byte[] td_height, byte[] glyph_esc) {return Img(hctx, img_cls, td_height, glyph_esc, glyph_esc, glyph_esc);}
 	private byte[] Img(Xoh_wtr_ctx hctx, byte[] img_cls, byte[] td_height, byte[] glyph, byte[] img_src_name, byte[] img_title) {
-		byte[] img_src = Bld_img_src(hiero_img_dir, img_src_name);
-		return glyph_img_fmtr.Bld_bry_many(temp_bfr, img_cls, Hiero_html_mgr.Image_margin, td_height, img_src, img_title, glyph);
+		// ISSUE#:553; DATE:2019-09-25
+		byte[] img_src_dir = hiero_img_dir;
+		byte[] img_hdump_atr = Bry_.Empty;
+		if (hctx.Mode_is_hdump()) {
+			img_src_dir = Bry_.Empty;
+			img_hdump_atr = Hiero_hdump_wkr.HDUMP_ATR;
+		}
+		return glyph_img_fmtr.Bld_bry_many(temp_bfr, img_cls, Hiero_html_mgr.Image_margin, td_height, img_src_dir, img_src_name, img_title, glyph, img_hdump_atr);
 	}
 	private static final    byte[] 
 	  Tbl_eol_bry = Bry_.new_a7(String_.Concat_lines_nl_skip_last
@@ -143,14 +152,23 @@ class Hiero_html_wtr {
 	, "      " + Tbl_bgn_str 
 	, "        <tr>"
 	));
-	private static final    Bry_fmtr glyph_img_fmtr = Bry_fmtr.new_
-	( "\n            <img ~{img_cls}style='margin: ~{img_margin}px; ~{option}' src='~{img_src}' title='~{img_title}' alt='~{glyph}' />"
-	, "img_cls", "img_margin", "option", "img_src", "img_title", "glyph");
 	public byte[] Void(boolean half) { // render void
 		int width = Hiero_html_mgr.Max_height;
 		if (half) width /= 2;
 		return void_fmtr.Bld_bry_many(temp_bfr, width);
 	}
+
+	private static final    Bry_fmtr glyph_img_fmtr = Bry_fmtr.new_(String_.Concat
+	( "\n            "
+	, "<img ~{img_cls}style='margin: ~{img_margin}px; ~{option}'"
+	, " src='~{hiero_img_dir}hiero_~{img_code}.png' title='~{img_title}' alt='~{glyph}' ~{data-xowa-hdump}/>"
+	), "img_cls", "img_margin", "option", "hiero_img_dir", "img_code", "img_title", "glyph", "data-xowa-hdump");
+	private static final    Bry_fmtr cartouche_img_fmtr = Bry_fmtr.new_(String_.Concat
+	( "\n            "
+	, "<img src='~{hiero_img_dir}hiero_~{img_code}.png'"
+	, " height='~{height}' title='~{title}'"
+	, " alt='~{title}' ~{data_xowa_hdump}/>"
+	), "hiero_img_dir", "img_code", "height", "title", "data_xowa_hdump");
 	private static final    Bry_fmtr void_fmtr = Bry_fmtr.new_(String_.Concat_lines_nl_skip_last
 	( ""
 	, "            <table class=\"mw-hiero-table\" style=\"width: ~{width}px;\">"
@@ -160,10 +178,4 @@ class Hiero_html_wtr {
 	, "              </tr>"
 	, "            </table>"
 	), "width");
-	private static byte[] Bld_img_src(byte[] hiero_img_dir, byte[] name) {
-		return Bry_.Add(hiero_img_dir, Img_src_prefix, name, Img_src_ext);
-	}
-	private static final    byte[] Img_src_prefix = Bry_.new_a7("hiero_")
-	, Img_src_ext = Bry_.new_a7(".png")
-	;
 }
diff --git a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_xtn_mgr.java b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_xtn_mgr.java
index a221b6cc1..58782103a 100644
--- a/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_xtn_mgr.java
+++ b/400_xowa/src/gplx/xowa/xtns/hieros/Hiero_xtn_mgr.java
@@ -20,14 +20,17 @@ public class Hiero_xtn_mgr extends Xox_mgr_base implements Gfo_invk {
 	@Override public byte[] Xtn_key() {return Xtn_key_static;} public static final    byte[] Xtn_key_static = Bry_.new_a7("hiero");
 	@Override public Xox_mgr Xtn_clone_new() {return new Hiero_xtn_mgr();}
 	public static byte[] Img_src_dir;
-	@Override public void Xtn_init_by_wiki(Xowe_wiki wiki) {}
+	private Io_url ext_root_dir;
+	@Override public void Xtn_init_by_wiki(Xowe_wiki wiki) {
+		Xoae_app app = wiki.Appe();
+		this.ext_root_dir = Hiero_root_dir(app.Fsys_mgr());
+		Img_src_dir = ext_root_dir.GenSubDir("img").To_http_file_bry();
+	}
 	private static boolean xtn_init_done = false;
 	public void Xtn_init_assert(Xowe_wiki wiki) {
 		if (xtn_init_done) return;
 		if (!Enabled()) return;
 		Xoae_app app = wiki.Appe();
-		Io_url ext_root_dir = Hiero_root_dir(app.Fsys_mgr());
-		Img_src_dir = Bry_.new_u8(ext_root_dir.GenSubDir("img").To_http_file_str());
 		app.Gfs_mgr().Run_url_for(this, ext_root_dir.GenSubFil_nest("data", "tables.gfs"));
 		html_wtr = new Hiero_html_mgr(this);
 		parser.Init();
@@ -50,6 +53,8 @@ public class Hiero_xtn_mgr extends Xox_mgr_base implements Gfo_invk {
 		else	return super.Invk(ctx, ikey, k, m);
 	}
 	public static final String Invk_prefabs = "prefabs", Invk_files = "files", Invk_phonemes = "phonemes";
+
+	// DRD:allow overwriting hiero-dir
 	public static void Hiero_root_dir_(Io_url v) {hiero_root_dir = v;} private static Io_url hiero_root_dir;
 	public static Io_url Hiero_root_dir(Xoa_fsys_mgr fsys_mgr) {return hiero_root_dir == null ? fsys_mgr.Bin_xtns_dir().GenSubDir("Wikihiero") : hiero_root_dir;}
 }