[MEI-L] Coordinate system confusion

Tue Jul 4 22:10:19 CEST 2017

Hi Craig,

Thank you very much. This is useful and the example was really clear.

Regards,

Martha

On Tue, Jul 4, 2017 at 2:38 PM, Craig Sapp <craigsapp at gmail.com> wrote:

> Hello Martha,
>
> On 4 July 2017 at 18:40, Martha Thomae <thomaemartha at gmail.com> wrote:
>
>> Sorry to intrude, but when reading this a question popped into my head.
>> Is it possible to use @vo or another attribute to change the line in
>> which a <rest> lies? This will help me with something I am working on.
>>
>
> In theory rest at vo should work, but testing in verovio it does not seem to
> be supported.  You will probably instead want to use rest at ploc and
> rest at oloc, which work in verovio.  @ploc is the pitch-class position of
> the rest on the staff, and @oloc is the octave of the pitch-class position.
>
> Example MEI data:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <?xml-model href="http://music-encoding.org/schema/4.0.0/mei-all.rng"
> type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0
> "?>
> <?xml-model href="http://music-encoding.org/schema/4.0.0/mei-all.rng"
> type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron
> "?>
> <mei xmlns="http://www.music-encoding.org/ns/mei" meiversion="4.0.0">
>     <meiHead>
>         <fileDesc>
>             <titleStmt>
>                 <title />
>             </titleStmt>
>             <pubStmt />
>         </fileDesc>
>     </meiHead>
>     <music>
>         <body>
>             <mdiv>
>                 <score>
>                     <scoreDef>
>                         <staffGrp>
>                             <staffDef clef.shape="G" clef.line="2"
> meter.count="4" meter.unit="4" n="1" lines="5" />
>                         </staffGrp>
>                     </scoreDef>
>                     <section>
>                         <measure>
>                             <staff n="1">
>                                 <layer n="1">
>                                     <note dur="4" oct="4" pname="b"
> accid.ges="n" />
>                                     <rest dur="4" ploc="c" oloc="6" />
>                                     <note dur="4" oct="4" pname="b"
> accid.ges="n" />
>                                     <note dur="4" oct="5" pname="b"
> accid.ges="n" />
>                                 </layer>
>                                 <layer n="2">
>                                     <note dur="4" oct="4" pname="e"
> accid.ges="n" />
>                                     <note dur="4" oct="5" pname="e"
> accid.ges="n" />
>                                     <note dur="2" oct="4" pname="f"
> accid.ges="n" />
>                                 </layer>
>                             </staff>
>                         </measure>
>                     </section>
>                 </score>
>             </mdiv>
>         </body>
>     </music>
> </mei>
>
> Rendering in verovio:
>
> [image: Inline images 1]
>
> In other words, the rest is placed at the position C6 (@ploc="c"
> @oloc="6").
>
> Usually you would use rest adjustments in this sort of situation (multiple
> layers of music), so specifying the pitch of the rest position will allow
> for a change of clef or transposition to handle the new placement of the
> rest correctly (@vo would not work in such cases).
>
> -=+Craig
>
>
>
>
>
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>
>

-- 
*Martha E. Thomae*
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