Re: Separation of configuration and control - good or bad?

[Phil Shafer <phil@juniper.net>]

Larry Menten writes:
>I am partial to the XPath subset approach, too.  It solves a lot of
>problems.

The biggest cons to using xpath are:

- Lack of schema-ability: Since xpath strings are just strings, you
can't validate a request against a schema to know that your request
is valid.

- Distinct syntax: While it's certainly possible to convert from
a configuration hierarchy into the xpath expression that represents
it, it's not trivial. Converting the other way (xpath -> element)
is even more difficult, though it would likely be rarely required.

- Assymetric syntax: Using a different syntax for rpc input parameters
than rpc output parameters seems unnatural and will make applications
that what to perform simple data transforms more difficult.

Thanks,
 Phil

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