Answer / ahmed

field catalog is used to represent the field where to and how to appear in the list.

Answer / teknath bera

Field catalog containing descriptions of the list output
fields. You can use fields of the catalog to determine the
number format and column properties of the list to be
displayed.

The field catalog contains more than 60 fields, some of
which are only used internally. The field catalog is
defined in the Data Dictionary through table type
LVC_T_FCAT.

We can get field description by calling function module
REUSE_ALV_FIELDCATALOG_MERGE

Answer / lokesh

Field catalog is used to populate the list header .we can
change them as per ur requirement.
To prepare field catalog certain fields are
essential .They are :
Fieldname : Internal table field
tabname : Internal table name
seltext_m : Selection text in the field
ref_tabname : referrence table name.

Answer / guest

This is used to define the output display properties of
data to be output using alv.

Answer / andy

Hi buddies

You can get some more information about each individual field in field catalog from <a href="http://www.how2sap.com/blog/alv/using-reuse_alv_-function-modules-field-catalog-slis_t_fieldcat_alv/">Introduction to Field Catalog ( SLIS_T_FIELDCAT_ALV )</a>. For a complete reference on ALVs, you can try <a href="http://www.how2sap.com/blog/alv/working-with-sap-alv-how-to-start-programming-sap-alv/">SAP ALV Tutorial : SAP ALV programming techniques</a>.

Cheers
Andy

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