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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear all,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>I have a general question on Darwin Core and the use of Darwin Core extensions.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>E.g. I want to use the Occurrence Core and Simple Images with a mysql database.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Problem: Only a few of my occurrences have images. The Darwin Core Archive creates a large images file with all occurrence IDs and only a few have also Image urls.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>But I did expect a file with the image urls only (so much shorter) and all occurrences (with or without image) in the occurrences file.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The same problem appears for the identification extension the other way round (duplication of occurrence rows for multiple identifications) and every other extension I’ve tested…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>But I am a bit confused how this can be done with only one big sql query (with some left joins). Do I have to use multiple resources to use multiple sql queries? Or is this a problem/bug of IPT?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Gabi<o:p></o:p></span></p></div></body></html>