Hp e-CommerceXML Accelerator sa7150 Manuel d'utilisateur télécharger pdf (Page 39)

C H A P T E R 3 XML Operations

Default Keyword

The keyword default can be used as an XML pattern’s XML

expression component to catch cases not covered by active XML

patterns with specific XML expressions. To illustrate, imagine you

have a number of active XML patterns assigned to different servers,

each with the same URI expression (orders.asp) but with different

XML expressions.

orders.asp & //company[name=”GM”]

orders.asp & //company[name=”Ford”]

orders.asp & //company[name=”Chrysler”]

orders.asp & default

For example, incoming XML messages aimed at the URI

“orders.asp” and containing the company names “Chevrolet,”

“BMW,” or “Honda” would not result in exact matches with any of

the first three XML patterns in the example above. However the XML

pattern containing default would catch all of these messages, because

the URI expression is an exact match and default in the XML

expression doesn’t match “GM,” “Ford,” or “Chrysler.”

Below is an example of the CLI input to create an XML pattern

containing the default keyword.

NOTE: Multiple XML

patterns can use the

default keyword, but they

must have different URI

expressions.

HP SA7150> create pattern gold

URI Expression: orders.asp

XML Expression: default

Enter another pattern? [n]:

HP SA7150>

XML Pattern Matching

The SA7150 looks first for URI expression matches. If matches for

URI expression are found, then the SA7150 looks for XML

expression matches.

• If both the URI and XML expressions match, the SA7150 sends

the message to the server to which the matching XML pattern is

assigned.

• If only the URI expression matches, the SA7150 sends the

message to the default XML server, if one is specified, or if not,

to the mapped server.

• If the URI expression does not match, the XML expression is

ignored and the message goes to the mapped server.

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Hp e-CommerceXML Accelerator sa7150 Manuel d'utilisateur Page 39

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