The Application Level Events (ALE) Specification, Version 1.0 - GS1
The Application Level Events (ALE) Specification, Version 1.0 - GS1
The Application Level Events (ALE) Specification, Version 1.0 - GS1
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<strong>The</strong> <strong>ALE</strong> clients are applications or services that process EPC tag information. Several<br />
methods are defined within the <strong>ALE</strong> interface which allow clients to specify the data they<br />
wish to receive and the conditions for the production of the reports containing the data.<br />
<strong>The</strong>se methods are:<br />
• define, undefine<br />
• subscribe, unsubscribe<br />
• poll<br />
• immediate<br />
• getECSpecNames, getECSpec<br />
<strong>The</strong>se methods are defined normatively in Section 8.1.<br />
13.2 Scenarios<br />
A few sample scenarios are illustrated below to demonstrate the use of the <strong>ALE</strong> interface<br />
messages. Below is a representative list of the kinds of scenarios <strong>ALE</strong> supports.<br />
1. Defining Subscribe ECName, ECSpec<br />
a. Direct Subscription. Defined by A, Report to: A<br />
b. Indirect Subscription Defined by A, Report to: B<br />
2. Poll(ECName)<br />
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