See information about the latest product version
Accessing attributes in a message in the MRM domain
When an MRM message is parsed into a logical tree, attributes and the data that they contain are created as name-value pairs in the same way that MRM elements are. The ESQL that you code to interrogate and update the data held in attributes refers to the attributes in a similar manner.
<Customer xmlns:addr="http://www.ibm.com/AddressDetails"
xmlns:brw="http://www.ibm.com/BorrowedDetails">
<Name LastName="Bloggs">
<Title>Mr</Title>
<FirstName>Fred</FirstName>
</Name>
<addr:Address>
<HouseNo>13</HouseNo>
<Street>Oak Street</Street>
<Town>Southampton</Town>
</addr:Address>
<ID>P</ID>
<PassportNo>J123456TT</PassportNo>
<brw:Borrowed>
<VideoTitle>Fast Cars</VideoTitle>
<DueDate>2003-05-23T01:00:00</DueDate>
<Cost>3.50</Cost>
</brw:Borrowed>
<brw:Borrowed>
<VideoTitle>Cut To The Chase</VideoTitle>
<DueDate>2003-05-23T01:00:00</DueDate>
<Cost>3.00</Cost>
</brw:Borrowed>
<Magazine>0</Magazine>
</Customer>
(0x0100001B):MRM = (
(0x01000013):Name = (
(0x0300000B):LastName = 'Bloggs'
(0x0300000B):Title = 'Mr'
(0x0300000B):FirstName = 'Fred'
)
(0x01000013)http://www.ibm.com/AddressDetails:Address = (
(0x0300000B):HouseNo = 13
(0x0300000B):Street = 'Oak Street'
(0x0300000B):Town = 'Southampton'
)
(0x0300000B):ID = 'P'
(0x0300000B):PassportNo = 'J123456TT'
(0x01000013)http://www.ibm.com/BorrowedDetails:Borrowed = (
(0x0300000B):VideoTitle = 'Fast Cars'
(0x0300000B):DueDate = TIMESTAMP '2003-05-23 00:00:00'
(0x0300000B):Cost = 3.50
)
(0x01000013)http://www.ibm.com/BorrowedDetails:Borrowed = (
(0x0300000B):VideoTitle = 'Cut To The Chase '
(0x0300000B):DueDate = TIMESTAMP '2003-05-23 00:00:00'
(0x0300000B):Cost = 3.00
)
(0x0300000B):Magazine = FALSE
SET OutputRoot.MRM.Name.LastName = 'Smith';
Be aware of the ordering of attributes when you code ESQL. When attributes are parsed, the logical tree inserts the corresponding name-value before the MRM element's child elements. In the previous example, the child elements Title and FirstName appear in the logical message tree after the attribute LastName. In the Broker Application Development perspective, the Outline view displays attributes after the elements. When you code ESQL to construct output messages, you must define name-value pairs for attributes before any child elements.
You can view information about samples only when you use the information center that is integrated with the WebSphere® Message Broker Toolkit or the online information center. You can run samples only when you use the information center that is integrated with the WebSphere Message Broker Toolkit.