README fix

README.md

@@ -364,39 +364,27 @@ Mandatory.
 ## Command-Line Interface
 
 ```
-yasd [-q | -l] CMD
+usage: yasd [-h] [-q] [-l] [-n NUM] {convert,check,sample,document,man} [file]
 
-CMD (mandatory and only one at once):
+YASD, Yet Another Schema Definition. YASD is a YAML format for human writable
+XSDs (XML Schema Definition), humans declare what is indispensable, leaving
+the machines to do the rest of the unreadable <syntaxis who_can_read_this="?"
+/>.
 
-convert [-f xsd | json] FILE 
-check FILE
-sample [-n INT] FILE
-man
-help
+positional arguments:
+  {convert,check,sample,document,man}
+                        action to perform
+  file                  file in YAML format
 
-ARGS:
+options:
+  -h, --help            show this help message and exit
+  -q, --quiet           enable quiet mode
+  -l, --log             write log
+  -n NUM, --num NUM     number of XML samples; 1 by default
 
--q | --quiet    No prints; doesn't apply for man and help.
--l | --logs     Writes logs.
--f | --format   Format type; could be 'xsd' or 'json'; 'xsd' by default.
--n | --num      Number of samples; 1 by default.
-convert         Converts YASD file to XSD or JSON format; XSD by default.
-check           Validates YASD file.
-sample          Writes XML samples according to schema. 
-man             Prints README.md
-help            Prints this.
-FILE            YAML file; file extension doesn't matter.
-
-EXAMPLES:
-
-yasd convert schema.yasd
-yasd --quiet --logs convert schema.yasd
-yasd -ql -f json convert schema.yasd
-yasd check schema.yaml
-yasd sample schema.yasd
-yasd sample -n 10 schema.yaml
-yasd man
-yasd help
+(c) 2023 Perro Tuerto <hi@perrotuerto.blog>. Founded by Mexican Academy of
+Language <https://academia.org.mx>. Licensed under GPLv3
+<https://www.gnu.org/licenses/gpl-3.0.en.html>.
 ```
 
 [^1]: The following explanation is practically a copy-paste from "XSD - The