.. index:: single: csv(Header,Separator,IgnoreQuotes,Comments)
.. _csv/4:

.. rst-class:: right

**object**

``csv(Header,Separator,IgnoreQuotes,Comments)``
===============================================

* ``Header`` - Header handling option with possible values ``missing``, ``skip``, and ``keep`` (default).
* ``Separator`` - Separator handling option with possible values ``comma`` (default for non ``.tsv`` and non ``.tab`` files or when no file name extension is available), ``tab`` (default for ``.tsv`` and ``.tab`` files), ``semicolon``, and ``colon``.
* ``IgnoreQuotes`` - Double-quotes handling option to ignore (``true``) or preserve (``false``; default) double quotes surrounding data.
* ``Comments`` - Comment handling option with possible values ``true`` and ``false`` (default). When ``true``, lines starting with ``#`` are skipped when reading CSV files and streams.


CSV file and stream reading and writing predicates.

| **Availability:** 
|    ``logtalk_load(csv(loader))``

| **Author:** Jacinto Dávila and Paulo Moura
| **Version:** 2:2:0
| **Date:** 2026-02-25

| **Compilation flags:**
|    ``static, context_switching_calls``


| **Implements:**
|    ``public`` :ref:`csv_protocol <csv_protocol/0>`
| **Uses:**
|    :ref:`list <list/0>`
|    :ref:`logtalk <logtalk/0>`
|    :ref:`os <os/0>`
|    :ref:`reader <reader/0>`
|    :ref:`type <type/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|     :ref:`csv_protocol/0::guess_arity/2`  :ref:`csv_protocol/0::guess_separator/2`  :ref:`csv_protocol/0::read_file/2`  :ref:`csv_protocol/0::read_file/3`  :ref:`csv_protocol/0::read_file_by_line/2`  :ref:`csv_protocol/0::read_file_by_line/3`  :ref:`csv_protocol/0::read_stream/2`  :ref:`csv_protocol/0::read_stream/3`  :ref:`csv_protocol/0::read_stream_by_line/2`  :ref:`csv_protocol/0::read_stream_by_line/3`  :ref:`csv_protocol/0::write_file/3`  :ref:`csv_protocol/0::write_stream/3`  

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

(no local declarations; see entity ancestors if any)

Protected predicates
--------------------

(no local declarations; see entity ancestors if any)

Private predicates
------------------

(no local declarations; see entity ancestors if any)

Operators
---------

(none)