Created question in FIWARE Q/A platform on 11-12-2014 at 20:12
Please, ANSWER this question AT https://stackoverflow.com/questions/27430623/attribute-reference-for-subscription-in-orion-context-broker-fiware

Question:
Attribute Reference for subscription in Orion Context Broker Fiware

Description:
What do I need to put in the reference attribute?

I'm using two forms, and the two are bad for Orion Context Broker:

URL url = new URL("http://130.206.127.23:1026/ngsi10/notifyContext");
//String url = "http://localhost:1028/accumulate";
cabecera.put("reference", ""+url);

With this code, I'm generating the next JSON String for the reference attribute

...."reference":"http:\/\/130.206.127.23:1026\/ngsi10\/notifyContext",...

And this is the response of OCB

<subscribeContextResponse>
<subscribeError>
<errorCode>
<code>400</code>
<reasonPhrase>Bad Request</reasonPhrase>
<details>JSON Parse Error: <unspecified file>(1): invalid escape sequence</details>
</errorCode>
</subscribeError>
</subscribeContextResponse>

Also related to this parameter,do I need a program in execution in a server to receive the information about my subscription?
Can I get a program from Orion Context Broker resources to do this task?

The following is my JSON to call the service, but I'm not sure about the reference attribute. I want to send a subscription to my Orion Context Broker instance. I'm sending this JSON:

{
"duration": "P1M",
"reference": "http://130.206.127.23:1026/ngsi10/notifyContext",
"notifyConditions": [

],
"entities": [

],
"attributes": [
"temperature"
]
}

Thanks in advance.