&reftitle.constants; &extension.constants;

`XSL_CLONE_AUTO` (`int`)

`XSL_CLONE_NEVER` (`int`)

`XSL_CLONE_ALWAYS` (`int`)

`LIBXSLT_VERSION` (`int`)

- libxslt version like 10117.

`LIBXSLT_DOTTED_VERSION` (`string`)

- libxslt version like 1.1.17.

`LIBEXSLT_VERSION` (`int`)

- libexslt version like 813.

`LIBEXSLT_DOTTED_VERSION` (`string`)

- libexslt version like 1.1.17.

`XSL_SECPREF_NONE` (`int`)

- Deactivate all security restrictions.

`XSL_SECPREF_READ_FILE` (`int`)

- Disallows reading files.

`XSL_SECPREF_WRITE_FILE` (`int`)

- Disallows writing files.

`XSL_SECPREF_CREATE_DIRECTORY` (`int`)

- Disallows creating directories.

`XSL_SECPREF_READ_NETWORK` (`int`)

- Disallows reading network files.

`XSL_SECPREF_WRITE_NETWORK` (`int`)

- Disallows writing network files.

`XSL_SECPREF_DEFAULT` (`int`)

- Disallows all write access, i.e. a bitmask of `XSL_SECPREF_WRITE_NETWORK` | `XSL_SECPREF_CREATE_DIRECTORY` | `XSL_SECPREF_WRITE_FILE`.