Hi Michael,
In a Custom Format the swizzle defines some of the controls that are
used when selecting multiple source datasets. I think it applies when
selecting datasets by any means, not just using the Swizzler (aka
"Multiple Datasource Selection Tool").
To be specific this setting controls whether multiple datasets are
treated separately inside the custom format, or as a single set of
features ("an inherent group-by" to quote Dale).
An Inner Swizzle means that each dataset that you read through the
custom format is treated separately. For example, if you have an
Intersector transformer in there features will only get intersected
against others in the same dataset.
An Outer Swizzle means that all datasets you read are processed as a
group. In the above example, features will be intersected against all
other features regardless of which dataset they came from.
So from all this you could (like me) infer that...
1) Swizzles make no difference when you are only reading one dataset
at a time
2) An Inner Swizzle could be used as a form of batch processing
3) There are probably memory implications about using an Outer Swizzle
when you don't have to
4) We need to document this better. I'll add something to fmepedia
Hope this helps. Interestingly, typing FME and Swizzle into Google
returns the following page... seems that FME not only fulfils your
spatial data requirements, it also makes you a cup of coffee...
http://www.cw-usa.com/supplies-coffeepots-home-krups-f15b0h.html
Regards,
Mark
Mark Ireland, Senior Product Specialist
Safe Software Inc. Surrey, BC, CANADA
[EMAIL PROTECTED] http://www.safe.com
Solutions for Spatial Data Translation, Distribution and Access
--- In [email protected], "mhabarta" <[EMAIL PROTECTED]> wrote:
>
> Hallo FMEers
>
> Somebody has any clue what "Swizzle Type" in Workbench Settings for
> a Custom Format is ??
>
> I couldn't find anything in documentation or Google ...
>
> Thanks Michael
>
For insights into what's up at Safe Software and what's on the development
horizon, visit Safe's blog at spatial-etl.blogspot.com.
Safe Software has also made slides available that outline enhancements planned
for FME 2007. The slides are from the "Road Ahead" presentation given on Day 2
of the FME Worldwide Users Conference. To view these slides, visit
www.safe.com/2006uc.
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