View source for Tango.info recorded performance code

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[[tango.info recorded performance code]] (TIRP)

See also 
* [[International Standard Recording Code]] ([[ISRC]])
* [[tango.info recording code]] (TIRC)

== Overview ==
TIRP is an [[identifier]] for groups of [[TINT]]ed tracks, to allow storing of shared meta data separate from the represented recordings.

It has a short in tango.info unique [[regex]] pattern. TIRP is easily to type, independent of case, [[URL encoding]] safe, able to be marked in common browser with simple double click (no dash, slash, dot), consumes few space in display.

Numeric codes might be needed in certain environments, TIRP specifies these.

=== Shared meta data ===
* matrice numbers
* 78rpm numbers
* performers
* rights holders: composers, authors, arranger
* lyrics
* copyright status
* recording location
* recording date
* work title

== Object coverage ==
 DELETE section, because TINTed audio is specific enough?

Audio recording having the genre: tango, vals, milonga or another genre if the audio exists on a [[78rpm]] or other vinyl and shellac along with audio from the aforementioned genres. LPs are only considered if there is at least 50% tango, vals, milonga content.

The definition of a recording is similar to "recordings" as defined by ISRC.
* [[International Standard Recording Code]] ISRC
* http://www.ifpi.org/content/section_resources/isrc_handbook.html#Heading337
Speed changes, remasterization etc create a new recording.

The '''primary''' coverage shall be of recordings from the 19th century that are not derived from other recordings, e.g. [[matrices]].

The current definition in tango.info of a recording is
"Each recording entry corresponds to a group of tracks that have the same title, orchestra, vocalist(s) and recording date (or no recording date). "

The listing 
https://tango.info/performance
shows recordings with at least 8 CD tracks. 

Tracks belonging to one primary recording could among other things differ in speed, and artefacts.

== Days with most recordings ==
 based on current tango.info tracks table
* https://tango.info/performance/1981-03-07 17 (q)
* https://tango.info/performance/1985-12-26 21 (u)
* https://tango.info/performance/1989-06-26 17 (q)
* https://tango.info/performance/1996-01-19 14 (n)

== Structure ==
=== Alphanumeric ===
* YYDDDL, [[regex]]: [0-9]{5}[a-z]{1}, 5 numbers, one letter
** YY - two digit year of audio creation
** DDD
*** '''YY001 - YY366 recordings made in 19th century with known dates and up to 26 recordings on that day. DDD shall be the ISO day number within that year (001 -366)'''
*** YY367 - YY999 recordings
**** YY367 - YY499 from 19th century
***** YY370 - YY378 from days that had more than 26 recordings
***** YY380 - YY388 known year but unknown date
****** ? year + month known
****** ? only year known
***** 91900 - 91989 unknown year
**** known decade
**** unknown decade
**** YY500 - YY950 from 20th century
** L - letter a-z assigned by tango.info starting with "a" running alphabetically.

=== Numeric ===
* YYDDDNN 
** YY as in alphanumeric
** DDD as in alphanumeric
** NN convert the letter to number, a = 01 ... z=26

==== ISRC mode ==== 
* CC-RRR-YY-NNNNN
** CC = [[ISO 3166-2 alpha 2 country code]] - use code from private range "XT"
** RRR = some own made identifier
** YY as in TIRC
** NNNNN - use DDD and NN from Numeric variant

==== TINP mode ====
* use a TINP range to store the 7 digit numeric code

=== Optional prefix ===
use ti prefix, better for string search, e.g. google
* http://www.google.com/search?q=44328h several false hits
* http://www.google.com/search?q=ti44328h no hit

=== Examples ===
1944-11-23 [[Palomita blanca]] Troilo
* https://tango.info/track/AnibaTroil/1944-11-23/work.palomita_blanca
* alphanumeric 44328a
** https://tango.info/44328a (future link)
* numeric 4432801
** [[ISRC]] mode XT-TIO-44-32801
** [[TINP]] mode 0248 ?? 4432801 C (the physical matrice as tradable object)

https://tango.info/track/1929-07-11
* 29192a [[El paladín]] tango Carlos Di Sarli matrice 44645-2 record 47138-B
* 29192b El paladín tango Carlos Di Sarli matrice 44645-4 record 47138-B
* 29192c [[Huella buey]]	tango	Orq. típica Víctor	Juan Carlos Delson, Roberto Díaz
* 29192d [[La tapera]]	ranchera	Orq. típica Víctor
* 29192e [[Sos una fiera]]	tango	Carlos Di Sarli	Roberto Dierene matrice 44644-2 record 47138-A
* 29192f Sos una fiera	tango	Carlos Di Sarli matrice 44644-5 record 47138-A

== Maintenance ==
=== Publication ===
The codes should be made public in different places, to minimize dependence on t.i once the codes are derived. It should be listed in the wiki, but also somewhere else. (github.com ?)

=== Registration ===
Primarily codes in the ranges YY001L-YY366L will be assigned.

Date, performers, work title is needed. There can be different takes on one day, if such data is available it can be used to create separate entries.

=== Changes ===
Dates may be "found" to be wrong, e.g. 44328a "found" to be recorded one day later, needing new code 44329e. Old code should be kept end get a link to the new one.

Spelling updates can take place. They should be recorded with timestamp.

Changes in artists - policy needed. E.g. There is
https://tango.info/performance/1929-07-11/work.sos_una_fiera
one instrumental, one with vocal. Adding vocal to non-vocal or removing all vocal from vocal and altering the vocal can all be corrections or be discovery of a new recording.

== Feedback ==
....

== Misc / kept as archive ==
=== Other names ===

* ! tango.info primary recording TIPR?
* ! tango.info recording master TIRM (is close to TIRC +)
* tango.info recording group code TIRG? ( could be confused in display and sound with TIRC)
* primary audio TIPA? 
* recorded audio TIRA? 
* audio code TIAC? 
* master code/media code TIMC?