Empty elements in rdf:Seq

-

i'm maintainer of libexiv2 uses xmpsdk manage xmp.  exiv2 library , command-line utility read/write/insert/delete metadata in images.  has support exif, iptc, xmp , icc profiles.
empty elements in rdf:seq - exiv2

 

one of our users has asked accessing empty li elements in seq.  here's xmp:

<?xpacket begin="" id="w5m0mpcehihzreszntczkc9d"?>

<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="xmp core 4.4.0-exiv2">

<rdf:rdf xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">

  <rdf:description rdf:about="" xmlns:darktable="http://darktable.sf.net/" >

   <darktable:multi_name>

    <rdf:seq>

     <rdf:li>foo</rdf:li>

     <rdf:li>bar</rdf:li>

     <rdf:li/>

     <rdf:li>baz</rdf:li>

    </rdf:seq>

   </darktable:multi_name>

  </rdf:description>

</rdf:rdf>

</x:xmpmeta>

<?xpacket end="w"?>

 

when read latest version of xmpsdk, here's output.

553 rmills@rmillsmbp:~/gnu/xmpsdk/xmp-toolkit-sdk-cc201607 $ samples/target/macintosh/intel_64/release/readingxmp ~/downloads/crash.xmp

no smart handler available /users/rmills/downloads/crash.xmp

trying packet scanning.

 

/users/rmills/downloads/crash.xmp opened successfully

dc:title in english =

dc:title in french =

 

xmp dumped xmpdump.txt

554 rmills@rmillsmbp:~/gnu/xmpsdk/xmp-toolkit-sdk-cc201607 $ cat xmpdump.txt

 

dumping xmpmeta object "" (0x0)

 

  darktable: http://darktable.sf.net/ (0x80000000 : schema)

  darktable:multi_name (0x600 : isordered isarray)

  [1] = "foo"

  [2] = "bar"

  [3] = "baz"

555 rmills@rmillsmbp:~/gnu/xmpsdk/xmp-toolkit-sdk-cc201607 $

 

as can see, xmpsdk ignores <rdf:li/> tag.  can see nothing in xmp specs or w3c/rdf specs if empty <rdf:li/> tag legal or illegal. 


it seems strange store empty element in seq, when obvious tag such <rdf:li>empty</rdf:li> explicit , read xmpsdk.


can comment this?

 

 

exiv2logo.png

hi clanmills

when xmp parser parses given rdf, ignores empty elements. internal representation of rdf generated xmp sdk has no empty element. not in case of array element, if give empty array input, same phenomenon happen.

now when xmp serialize rdf output, pretty clear empty elements not there lost while parsing.

empty elements of no significance , not contain information. there no point in storing them , processing them give output. hence xmp goes above mentioned approach



More discussions in XMP SDK


adobe

Comments

Post a Comment

Popular posts from this blog

Illustrator CS6 Ocurrío un error E/S en el archivo.

-
este error me me sale cada ves que guardo un archivo que ya estado trabajando varias veces, sale cuando ya esta finalizando el proceso de guardar, ya probe cambiar nombre del archivo, ubicación de guardado, convertí curvas las fuentes y sigue saliendo el mismo error, no se que mas hacer, si alguien le ha sucedido y sabe como solucionarlo por favor ayuda. versión exacta (acerca de illustrator) de illustrator? versión sistema operativo?   guardas en el disco duro principal del ordenador o en otro disco, memoria pendrive,...? ese disco que clase de disco, modelo, antiguedad, espacio libre,...? More discussions in Foro en español adobe
Read more

Why is os_ViewContainer running?

-
when open illustrator (cc) opens window os_viewcontainer cannot view or close. shows in taskbar second window illustrator when mousing on ai icon. have tried select no luck. have tried clear using red x, no luck. close when close illustrator. wondering why there , if should concerned. oh, running windows 10. hi ccsachs,   as per query when launch illustrator opens " os_viewcontainer "   i request please share screenshots along below-mentioned details:   exact version of illustrator  graphic card using , when updated last time how performs in safe mode? ( https://support.microsoft.com/en-in/help/12376/windows-10-start-your-pc-in-safe-mode ) if works fine in safe mode please share antivirus using?   regards srishti More discussions in Illustrator adobe
Read more

Animate - problem with duplicating scripts after loop

-
hi all,   i have problem simple button script @ first frame. fine when timeline playing first time. after when timeline loops , stop again @ 0 frame button script fireing 2 times, when loops third time fireing 3 times etc...   here script:   this.stop(); exportroot.mc_cta.cursor = "pointer";   this.mc_cta.on("click", clickfunc.bind(this));   function clickfunc() {     console.log("clicked");     eb.useractioncounter("clicked");     exportroot.gotoandplay(1); }   anybody ideas? wrong?   thanks! kris use:   this.stop(); exportroot.mc_cta.cursor = "pointer";   if(!this.alreadyexecuted){ this.alreadyexecuted=true; this.mc_cta.on("click", clickfunc.bind(this));   function clickfunc() { console.log("clicked"); eb.useractioncounter("clicked"); exportroot.gotoandplay(1); } } More discussions in Adobe Animate CC - General adobe
Read more