[Doc] Transfer legacy2yaml tutorial

doc/sphinx/userguide/index.md

@@ -31,6 +31,7 @@ conditions, or calculating the voltage of a Lithium-ion battery as it is dischar
 - [](creating-mechanisms)
 - [](thermobuild)
 - [](input-errors)
+- [](legacy2yaml-tutorial)
 
 ```{toctree}
 :hidden:
@@ -42,4 +43,5 @@ ck2yaml-tutorial
 creating-mechanisms
 thermobuild
 input-errors
+legacy2yaml-tutorial
 ```

doc/sphinx/userguide/legacy2yaml-tutorial.md

@@ -0,0 +1,82 @@
+# Converting Legacy CTI and XML Input Files to YAML
+
+If you want to convert an existing, legacy CTI or XML input file to the YAML format,
+this section will help.
+
+## cti2yaml
+
+Cantera comes with a converter utility `cti2yaml` (or `cti2yaml.py`) that converts
+legacy CTI format mechanisms into the new YAML format introduced in Cantera 2.5. This
+program can be run from the command line to convert files to the YAML format.
+
+**Usage:**
+
+```bash
+cti2yaml [-h] input [output]
+```
+
+The `input` argument is required, and specifies the name of the input file to be
+converted. The optional `output` argument specifies the name of the new output file. If
+`output` is not specified, then the output file will have the same name as the input
+file, with the extension replaced with `.yaml`. The full command line interface for
+`cti2yaml` is documented [here](/yaml/cti2yaml).
+
+**Example:**
+
+```bash
+cti2yaml mymech.cti
+```
+
+will generate the output file `mymech.yaml`.
+
+If the `cti2yaml` script is not on your path, but the Cantera Python module is,
+`cti2yaml` can be used by running:
+
+```bash
+python -m cantera.cti2yaml mymech.cti
+```
+
+It is not necessary to use `cti2yaml` to convert any of the CTI input files previously
+included with Cantera. YAML versions of these files are already included with Cantera.
+
+```{tip}
+For input files where you have both the CTI and XML versions, `cti2yaml` is recommended
+over `ctml2yaml`. In cases where the mechanism was originally converted from a CK-format
+mechanism, it is recommended to use `ck2yaml` if the original input files are available.
+```
+
+## ctml2yaml
+
+Cantera comes with a converter utility `ctml2yaml` (or `ctml2yaml.py`) that converts
+legacy XML (CTML) format mechanisms into the new YAML format introduced in Cantera 2.5.
+This program can be run from the command line to convert files to the YAML format.
+
+**Usage:**
+
+```bash
+ctml2yaml [-h] input [output]
+```
+
+The `input` argument is required, and specifies the name of the input file to be
+converted. The optional `output` argument specifies the name of the new output file. If
+`output` is not specified, then the output file will have the same name as the input
+file, with the extension replaced with `.yaml`. The full command line interface for
+`ctml2yaml` is documented [here](/yaml/ctml2yaml).
+
+**Example:**
+
+```bash
+ctml2yaml mymech.xml
+```
+
+will generate the output file `mymech.yaml`.
+
+If the `ctml2yaml` script is not on your path, but the Cantera Python module is,
+`ctml2yaml` can be used by running:
+
+```bash
+python -m cantera.cti2yaml mymech.xml
+```
+
+It is not necessary to use `ctml2yaml` to convert any of the XML input files included
+with Cantera. YAML versions of these files are already included with Cantera.

doc/sphinx/yaml/cti2yaml.rst

@@ -5,8 +5,7 @@ CTI to YAML conversion
 ***********************
 
 .. seealso::
-    For a tutorial, refer to the `Converting CTI and XML input files to YAML
-    <https://cantera.org/tutorials/legacy2yaml.html>`_ pages.
+    For a tutorial, refer to the page :doc:`/userguide/legacy2yaml-tutorial`.
 
 .. argparse::
    :module: cantera.cti2yaml

doc/sphinx/yaml/ctml2yaml.rst

@@ -5,8 +5,7 @@ CTML to YAML conversion
 ***********************
 
 .. seealso::
-    For a tutorial, refer to the `Converting CTI and XML input files to YAML
-    <https://cantera.org/tutorials/legacy2yaml.html>`_ pages.
+    For a tutorial, refer to the page :doc:`/userguide/legacy2yaml-tutorial`.
 
 .. argparse::
    :module: cantera.ctml2yaml