I'm no MARC expert, but I've learned enough to say that yes, this is valid in that what you're seeing is the $q (Electronic format type) and $u (Uniform Resource Identifier ) subfields of the 856 field.
You'll see other things when you get multiple authors (creators) on an item or multiple anythings that can occur more than once.
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On May 19, 2011, at 12:37 PM, James Lecard wrote:
> I'm using ruby-marc ruby parser (v.0.4.2) to parse some marc files I get
> from a partner.
> The 856 field is splitted over 2 lines, causing the ruby library to ignore
> it (I've patched it to overcome this issue) but I want to know if this kind
> of marc is valid ?
> =LDR 00638nam 2200181uu 4500
> =001 cla-MldNA01
> =008 080101s2008\\\\\\\|||||||||||||||||fre||
> =040 \\$aMy Provider
> =041 0\$afre
> =245 10$aThis Subject
> =260 \\$aParis$bJ. Doe$c2008
> =490 \\$aSome topic
> =650 1\$aNarratif, Autre forme
> =655 \7$abook$2lcsh
> =752 \\$aA Place on earth
> =776 \\$dParis: John Doe and Cie, 1973
> =856 \2$qtext/html
> =856 \\$uhttp://www.this-link-will-not-be-retrieved-by-ruby-marc-library
> James L.