Field only known in Customer Exit

Hi all,
I know this topic has been discussed quite number of times before on SDN, but still i am confused with this field indicator.
Based on previous posts in SDN, what i understand is that if we enhance a datasource by appending a field to
extract structure we check this field.
If i am not wrong we write the code to populate this field in CMOD.
I have a bunch of fields appended to extract structure and i see that
not all fields are checked for"filed only known in CustExit". But still i get data for these fields
when i do extraction. All these fields are populated in UserExit.
when data can be extracted even if "field know in custexit" is not checked. what is the significance of this indicator.
Thanks
Silpa

*If fields are part of a standard extractor i can understand them not being checked. But in my case i have Z custom fields some of which are checked others are not.
Eg: ZZ1, ZZ2, ZZ3, ZZ4. I have ZZ1, ZZ2 checked and ZZ3, ZZ4 not checked for "field known in customer exit" indicator.
So you mean to say ZZ3 and ZZ4 will not get any values even though there is code for these two fields in customer exit.*
What I meant was that irrespective of whether or not "field known in customer exit" is set, if in your customer exit you have coded for populating data to particular fields, those fields will get the data from customer exit.
eg.
zz1 and zz2 are set with this indicator
zz3 and zz4 are not set
If you code for zz1, zz2, zz3 and zz4, you can populate these values in exit
If not, these fields will not be automatically populated in standard extractors as it can do so only for the fields which are part of standard extractors.
Your main question was 'what is the significane of "field know in custexit" indicator'
Its main significance as I have mentioned is that if a field is set with this indicator and the coding is not done in customer exit, that particular field will not get populated
Edited by: Rahul K Rai on Jul 13, 2010 7:31 PM

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Edited by: rave king on Oct 14, 2008 11:09 AM
Edited by: rave king on Oct 15, 2008 6:25 AM

Hi
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Message was edited by:
I_LOVE_PORTAL
Message was edited by:
I_LOVE_PORTAL

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[Other useful link|http://www.integratedcg.com/pdfs/FI2004_1.pdf]
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