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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">ITEMS are shorter. An brevity in APRS is always desired.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">But there is a bug in tens of thousands of D700 radios that has a problem with ITEMS. </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I cannot remember for sure. (don’t have time to research it right now)… But the bug MAY only be a problem if the ITEM uses compressed format.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">So on sending, use an ITEM unless:</span></p><p class="MsoListParagraph" style><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><span style>1)<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> the sender wants to time-stamp the object (always a good idea for things that are not permanent and will eventually be of no value) </span></p><p class="MsoListParagraph" style><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><span style>2)<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The sender wants permanence 111111z</span></p><p class="MsoListParagraph" style><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><span style>3)<span style="font:7.0pt "Times New Roman""> </span></span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The sender wants compressed.</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I think I got that right?</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Bob</span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:aprssig-bounces@tapr.org">aprssig-bounces@tapr.org</a> [mailto:<a href="mailto:aprssig-bounces@tapr.org">aprssig-bounces@tapr.org</a>] <b>On Behalf Of </b>Andrew P.<br><b>Sent:</b> Wednesday, December 10, 2014 5:59 PM<br><b>To:</b> <a href="mailto:aprssig@tapr.org">aprssig@tapr.org</a><br><b>Subject:</b> [aprssig] difference between Objects and Items?</span></p></div></div><p class="MsoNormal"> </p><div><p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-family:"Calibri","sans-serif"">Greetings, all.<br><br>I have a question for the long-time APRS wizards out there. What is the difference between an Object and an Item (other than the message format differences documented in the APRS Protocol Specification), and why would you choose one message format over the other to report a non-station entity? There doesn't seem to be much difference, conceptually speaking, between an Object with a timestamp set to the originating station's transmission time and an Item. Obviously, only Objects can be permanent, since only they can have timestamps set to the reserved code for permanence ("111111z").<br><br>Due to this ambiguity, I may have an error in my APRS client program, and I would like to correct this. Should the program infer use of Object format versus Item format for locally-originated entities from the permanence of the entity (or from other attributes), or explicitly require the user to specify which format to use? On a "take-over" of another station's Object or Item, should the Object versus Item characteristic be preserved in the take-over? Are Objects and Items in different namespaces (i.e., can you have an Object and an Item with the same name string and have them refer to distinct entities)?<br><br>Thanks in advance.<br><br>Andrew Pavlin, KA2DDO<br>author of YAAC ("Yet Another APRS Client")<br><a href="http://www.ka2ddo.org/ka2ddo/YAAC.html" target="_blank">http://www.ka2ddo.org/ka2ddo/YAAC.html</a></span></p></div></div></body></html>