Support frame=none,grid=none

[Intelligent2013]

Source issue: #48

The example contains the data in the borderless table. Source PDF fragment:

I've tried to add frame=none,grid=none (from https://docs.asciidoctor.org/asciidoc/latest/tables/borders/):

[cols="1,1,1",options="unnumbered",frame=none,grid=none]
|===
| 締結用部品－ +
（前置き要素）
| おねじ部品－ +
（主要素）
| 呼び長さ及びねじ部長さ +
（補完要素）

|===

but in the Presentation XML there aren't any mentions about borders:

<table id="_722aa30a-13f0-f3ce-c66c-9c39c6c2df96" unnumbered="true">
	<thead/>
	<colgroup>
		<col width="33.3333%"/>
		<col width="33.3333%"/>
		<col width="33.3334%"/>
	</colgroup>
	<tbody>
		<tr>
			<td align="left" valign="top">締結用部品－
                                            <br/>（前置き要素）</td>
			<td align="left" valign="top">おねじ部品－
                                            <br/>（主要素）</td>
			<td align="left" valign="top">呼び長さ及びねじ部長さ
                                            <br/>（補完要素）</td>
		</tr>
	</tbody>
</table>

Is there a way to turn-off the table borders?

[opoudjis]

Is there a way to turn-off the table borders?

Not yet: the frame and grid parameters are simply ignored in processing Asciidoctor. And I am going to resist suggestions of ad hoc formatting of tables, unless they are explicitly required by the SDO. All SDOs we have dealt with are strict with table formatting: they either require one style for all of them, or else they semantically motivate the different ways of rendering them. I do not welcome turning off table borders, and I would want a genuine reason for doing so.

"We did that in that one document (where it wasn't even a table but an example)" is not enough of a genuine reason.

Yes. I know I am being Dr No about feature modifications in Metanorma. But someone has to be. The more freedom we give to formatting, the more Metanorma degenerates into just being Word.

I am unwilling to do this until we have had a real discussion with JIS, or unless you can provide me with a principled motivation (e.g. tables within examples are always borderless).