---
name: "cif-drop"
section: "1"
platform: "linux"
package: "cif-tools"
version: "1.0.0-3+b1"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/cif-drop"
---

# cif-drop(1)

A tool to drop columns from mmCIF files

## NAME

cif-drop - A tool to drop columns from mmCIF files

## SYNOPSIS

cif-drop \[OPTION\] file1 \[file2..\]

## DESCRIPTION

This tool makes it easy to drop a single column from a category in mmCIF files.

## OPTIONS

- **--output**=\<file\>, **-o** \<file\>

  Write output to *\<file\>*, default is *stdout*.

- **--column**=\<name\>, **-c** \<name\>

  Colunn to drop, should be of the form **'\_category.item'** with the leading underscore. Can be specified multiple times.

- **--verbose**,**-v**

  Be more verbose, useful to diagnose validation errors.

## AUTHOR

Written by Maarten L. Hekkelman \<maarten@hekkelman.com\>

## REPORTING BUGS

Report bugs at https://github.com/PDB-REDO/cif-tools/issues

## SEE ALSO

**cif-diff**, **cif-grep**, **cif-merge**, **cif-validate**,  **cif2pdb**, **mmCQL**, **pdb2cif**.