From 09ff3aac7d16cc284695b16ca3f3d0b3a2df1d32 Mon Sep 17 00:00:00 2001
From: Alexey Vazhnov <vazhnov@boot-keys.org>
Date: Sun, 21 Dec 2025 19:09:34 +0100
Subject: [PATCH] README.md: + How to detect an internal format of .ild file; +
 https://ilda.com/resources/StandardsDocs/ILDA_IDTF14_rev011.pdf

---
 README.md | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 2cfac82..4a01063 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,35 @@
 # svg2ild
 
-Converts a series of .svg files to .ild animation for laser shows.
+Converts a series of `.svg` files to `.ild` animation for laser shows.
+Supports both static and animated images.
 
 ILDA - image data transfer format for laser shows.
-Description of the format, made by author of the `LaserBoy`: <https://laserboy.org/ilda_file_format.html>.
+
+Description of the format:
+
+* Official: <https://ilda.com/resources/StandardsDocs/ILDA_IDTF14_rev011.pdf> (80 KiB, revision 011, <time>2014-11-16</time>).
+* Made by author of the `LaserBoy`: <https://laserboy.org/ilda_file_format.html>.
+
+## How to
+
+### How to detect an internal format of .ild file
+
+You can use [file](https://en.wikipedia.org/wiki/File_%28Unix%29) tool from package `file` ([sources](https://www.darwinsys.com/file/)):
+
+```console
+ % file ./*.ild
+./hs.ild:         ILDA Image Data Transfer Format 3D Coordinates with Indexed Color, company MIKLO, number of records 88, palette number 0, number of frames 1
+./opos.ild:       ILDA Image Data Transfer Format 3D Coordinates with Indexed Color, company MIKLO, number of records 2137, palette number 0, number of frames 1
+./rgb.ild:        ILDA Image Data Transfer Format 3D Coordinates with Indexed Color, company MIKLO, number of records 18, palette number 0, number of frames 1
+./text-paths.ild: ILDA Image Data Transfer Format 3D Coordinates with Indexed Color, company MIKLO, number of records 102, palette number 0, number of frames 1
+```
 
 ## Links
 
 * Homepage: <https://git.hswro.org/miklo/svg2ild>.
 * Documentation: <https://git.hswro.org/miklo/svg2ild/wiki>.
 * Mirror: <https://forge.citizen4.eu/miklo/svg2ild>.
+
+## License
+
+AGPL v3.0