Re: [GSoC] spanners project update

[Urs Liska]

Am 30.06.2016 um 14:05 schrieb David Kastrup:
> Urs Liska <address@hidden> writes:
>
>> Am 30.06.2016 um 11:52 schrieb David Kastrup:
>>>> There is a detail I would like to clarify. David suggested allowing \=
>>>>> to optionally specify the parent context in which a cross-voice
>>>>> spanner's information is shared (although I am not sure how that would
>>>>> be done with a key-list, since I think the spanner id itself is a
>>>>> string).
>>> Right.  Maybe it should rather be a key?  That would also make
>>> comparison generally faster than string comparisons.
>>>
>> Please consider keeping that as a string.
>> When we might start interacting with XML formats (MusicXML, MEI) we'll
>> have to deal with string xmlid attributes.
> What forms can they take?

Well, basically whatever a given project may come up with or what an XML
editor may choose to auto-generate or whatever.
The following is from a file on http://verovio.org

                            <staff n="2">
                                <layer n="1">
                                    <beam>
                                        <note xml:id="d648110e152" pname="a" 
oct="3" dur="8" dots="1" stem.dir="up" accid.ges="f"/>
                                        <note xml:id="d648110e173" pname="b" 
oct="3" dur="16" stem.dir="up" accid.ges="f"/>
                                    </beam>
                                    <beam>
                                        <note xml:id="d648110e195" pname="b" 
oct="3" dur="8" dots="1" stem.dir="up" accid.ges="f"/>
                                        <note xml:id="d648110e216" pname="c" 
oct="4" dur="16" stem.dir="up"/>
                                    </beam>
                                    <note xml:id="d648110e236" pname="c" 
oct="4" dur="4" stem.dir="up"/>
                                </layer>
                            </staff>

but I have also seen some more or less intuitive schemes attributing
some semantic information to them (context, timing etc.). They might as
well be timestamps and/or generated GUIDs.

So, basically anything that a string can hold.

Urs