[Nepomuk] Nepomuk and lyrics stuff

[phreedom at yandex.ru]

On Среда 20 марта 2013 17:11:24 Ignacio Serantes wrote:
> There are several places to obtains lyrics in a predictable format with an
> API, for example LyricWiki, even with support to multiple languages. One
> example with kana, rōmaji and English versions here: 宇多田ヒカル ー
> 光<http://lyrics.wikia.com/%E5%AE%87%E5%A4%9A%E7%94%B0%E3%83%92%E3%82%AB%E3%8
> 3%AB_(Hikaru_Utada):%E5%85%89> .

Wow... that's quite  a nice format, and it contains some features which we 
definitely didn't think of when nmm was drafted. Makes me feel good about not 
prematurely standardizing on lyrics metadata.

> There is too a file format to store synchronized lyrics,
> http://en.wikipedia.org/wiki/LRC_(file_format) and there are several
> servers offering this lyrics format.

> The problem here is not obtaining lyrics but how reliable is the subtitle
> because basically that databases are created by people like the Wikipedia.

Of course but if there's a critical mass, it's only a matter of time before it 
becomes good enough. Is there a critical mass for syncronized lyrics? Human-
made lyrics translation is a very appealing feature, but are these also 
available in a synchronized format?

And the million dollar question, if we standardize on LRC which looks quite 
backwards-compatible with plaintext: should we store it as-is in a single 
property?

Any nasty corner cases we might not like?

A good starting point for the discussion seems to be nmm:lyrics in LRC format 
+ plaintext dump into nie:plainTextContent.

> Finally there are a bunch of lyrics fetchers because are easy to implement
> and even I wrote two, one deprecated for Amarok 2 written in jscript, and
> the one I used in my daily basics written in python.
> 
> On Wed, Mar 20, 2013 at 4:52 PM, <phreedom at yandex.ru> wrote:
> > On Среда 20 марта 2013 16:06:39 Ignacio Serantes wrote:
> > > Extracted from ontology documentation:
> > > 
> > > Plain-text representation of the content of a InformationElement
> > > with all markup removed. The main purpose of this property is
> > > full-text indexing> 
> > and
> > 
> > > search. Its exact content is considered application-specific. The
> > > user
> > 
> > can
> > 
> > > make no assumptions about what is and what is not contained within.
> > > *Applications
> > > should use more specific properties wherever possible*.
> > 
> > *wherever possible*. The rationale for not adding a specific property
> > like nmm:lyrics was that such a property might be underspecified and
> > effectively useless. Also, this would mean lots of content types would
> > get their own "nicely named plain-text version of the data without any
> > strict
> > serialization
> > requirements" properties without any useful result either.
> > 
> > To put "The user can make no assumptions about what is and what is not
> > contained within" into musical context: typical data ripped off a lyrics
> > site
> > might contain lyrics only, or lyrics prepended with band, title or who
> > knows
> > what else, format can be quite "flexible" too, even worse if you use
> > several
> > lyrics sources.
> > 
> > So, the user who knows what nmm:MusicPiece is, also knows that you can
> > get a
> > somewhat useful, but not machine-readable text dump in
> > nie:plainTextContent which is likely to also contain lyrics, and that's
> > exactly what you get from a
> > typical lyrics site.
> > 
> > Properly implemented lyrics needs a rather clean feed and who knows
> > maybe
> > it
> > shouldn't even be implemented as a single text property. Maybe a
> > subtitle-like
> > approach "time-stamped text" is a better idea?
> > 
> > Or, maybe I missed some important development and there's a very good
> > authoritative lyrics DB with a predictable format and we should get
> > started on
> > defining nmm:lyrics? I don't monitor this actively...
> > 
> > > When documentation informs you that other ontologies should be used
> > > I
> > 
> > have
> > 
> > > doubts.
> > > 
> > > On Wed, Mar 20, 2013 at 2:54 PM, <phreedom at yandex.ru> wrote:
> > > > On Вторник 19 марта 2013 20:22:14 Ignacio Serantes wrote:
> > > > > Hi list,
> > > > > 
> > > > > As a first step to add music lyrics to Nepomuk I will add
> > > > > support
> > > > > for
> > > > > lyrics frames in audio files in taglibextractor and this
> > > > > data will
> > > > > be
> > > > > stored in
> > > > > nie:plainTextContent<
> > > > 
> > > > http://www.semanticdesktop.org/ontologies/nie/#plainTe
> > > > 
> > > > > xtContent> because there is no better place to store this
> > > > > information.
> > > > 
> > > > This is the proper place to store lyrics.