Column-Aligned Text (CAT) Reader Parameters
Number of Lines to Skip
Identifies the number of lines to skip at the top of the file. It is useful to enter a value here if the Column-Aligned Text file contains a header line of field names or other descriptive material that should be skipped.
By default, all lines are included.
Field Boundaries / Field Properties
These areas list the name, type, and width of the fields that comprise a row.
Fields containing X, Y, or Z-Coordinates will comprise the point geometry of the feature, while fields with the type Integer, Real, or String will be attributes.
Click the ruler in Field Boundaries to add, remove, or move field boundaries.
The ordering of the fields is important. The first field always starts at the first character in a row and is width characters wide. Subsequent fields start where the previous field ends.
Check Do Not Use to skip a field.

Filter names based on the Row Number.
- When checked: Enter a starting Row Number and include field names in Field Properties.
- When unchecked: Use column numbers.

Filter names based on the list in Field Properties. White space is trimmed from the value before matching.
Invert Filter
- When checked: Exclude rows that match the filter.
- When unchecked: Include only rows that match the filter.

Use this parameter to expose Format Attributes in FME Workbench when you create a workspace:
- In a dynamic scenario, it means these attributes can be passed to the output dataset at runtime.
- In a non-dynamic scenario, this parameter allows you to expose additional attributes on multiple feature types. Click the browse button to view the available format attributes (which are different for each format) for the reader.