_png_chunk.html#ad4da002e97c3f74d4749e1d03e1beb7a">Id</a></td></tr>
<tr class="memdesc:ad4da002e97c3f74d4749e1d03e1beb7a inherit pub_attribs_class_hjg_1_1_pngcs_1_1_chunks_1_1_png_chunk"><td class="mdescLeft">&#160;</td><td class="mdescRight">4 letters. The Id almost determines the concrete type (except for PngUKNOWN)  <a href="#ad4da002e97c3f74d4749e1d03e1beb7a"></a><br/></td></tr>
<tr class="separator:ad4da002e97c3f74d4749e1d03e1beb7a inherit pub_attribs_class_hjg_1_1_pngcs_1_1_chunks_1_1_png_chunk"><td c