wiki-archive/twiki/data/TAPIR/HeaderProposalThree.txt,v

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@Initial revision
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1.7
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@Revision 7
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@---+ HeaderProposalThree

The header is used in both requests and responses to communicate directly with a single resource (datasource). Examples:

---+++++ Header from a "manual" request sent directly to a resource
<verbatim>
<header>
   <source accesspoint="13.14.15.16" sendtime="2001-12-17T09:30:47-05:00" HeaderProposalThree>
</header>
</verbatim>

Note: in this case no software has been specified, and there's only a single source element.

---+++++ Header from a response to the previous request
<verbatim>
<header>
   <source accesspoint="http://mydomain.org/provider/wrapper.php" sendtime="2001-12-17T09:30:50-05:00">
     <software name="PHP Provider" version="1.1.4" HeaderProposalThree>
        </source>
</header>
</verbatim>

Note: the source address in resource responses must be the exact accesspoint of the resource, otherwise clients won't be able to easily identify which response belongs to each resource.

---+++++ Header from a client software request that has been dispatched by a portal
<verbatim>
<header>
   <source accesspoint="11.12.13.14" sendtime="2001-12-17T09:30:47-05:00">
     <software name="GBIF Website" HeaderProposalThree>
   </source>
   <source accesspoint="15.16.17.18" sendtime="2001-12-17T09:30:49-05:00">
     <software name="Portal Engine" version="0.95" HeaderProposalThree>
   </source>
</header>
</verbatim>

Note: Intermediaries such as portals (MessageBrokers) are not obliged to include a source element in the header, although that's a recommended behavior.

---+++++ Header from a more detailed response to the previous request
<verbatim>
<header>
   <source accesspoint="http://mydomain.org/myresource/wrapper.py" sendtime="2001-12-17T09:30:50-05:00">
     <software name="PyWrapper" version="1.3.6" HeaderProposalThree>
     <software name="Python" version="2.3" HeaderProposalThree>
        </source>
</header>
</verbatim>

Note: each "source" has the freedom to specify other related software.
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Note: Intermediaries such as portals (message brokers) are not obliged to include a source element in the header, although that's a recommended behavior.
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@Revision 5
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Note: in this case no software has been specified, and that there's only a single source element.
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Notice that no software has been specified, and that there's only a single source element.
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@d8 1
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   <source ip="13.14.15.16" sendtime="2001-12-17T09:30:47-05:00" HeaderProposalThree>
d17 1
a17 1
   <source ip="17.18.19.20" sendtime="2001-12-17T09:30:50-05:00">
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   <source ip="11.12.13.14" sendtime="2001-12-17T09:30:47-05:00">
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   <source ip="15.16.17.18" sendtime="2001-12-17T09:30:49-05:00">
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   <source ip="17.18.19.20" sendtime="2001-12-17T09:30:50-05:00">
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---+++++ Header from a "manual" request send directly to a resource
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a23 1
---+++++ Header from a request dispatched by a portal from a client software
d35 2
d46 2
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1.1
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@Initial revision
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@d8 1
a8 1
   <source sendtime="2001-12-17T09:30:47-05:00">13.14.15.16</source>
d17 3
a19 2
   <software name="PyWrapper" version="1.3.6" HeaderProposalThree>
   <source sendtime="2001-12-17T09:30:50-05:00">17.18.19.20</source>
d26 6
a31 4
   <software name="GBIF website" version="1.0" HeaderProposalThree> (included by the client software)
   <software name="portal engine" version="0.95" HeaderProposalThree> (included by the portal)
   <source sendtime="2001-12-17T09:30:47-05:00">11.12.13.14</source> (included by the client software)
   <source sendtime="2001-12-17T09:30:49-05:00">15.16.17.18</source> (included by the portal)
d35 9
a43 1
Open issue: Shouldn't we incorporate the software attributes into the source element??
@