<s>
BookBrainz	B-Library
is	O
a	O
free	B-License
and	I-License
open	I-License
source	I-License
bibliographic	O
database	O
.	O
</s>
<s>
It	O
is	O
a	O
MetaBrainz	O
Foundation	O
project	O
that	O
is	O
allied	O
with	O
MusicBrainz	B-Application
.	O
</s>
<s>
It	O
has	O
been	O
endorsed	O
by	O
the	O
Open	O
Data	O
Institute	O
and	O
participates	O
in	O
the	O
Google	B-Application
Summer	I-Application
of	I-Application
Code	I-Application
yearly	O
.	O
</s>
<s>
BookBrainz	B-Library
uses	O
UUIDs	O
for	O
entities	O
and	O
allows	O
for	O
detailed	O
relationships	O
between	O
entities	O
such	O
as	O
authors	O
,	O
works	O
,	O
editions	O
and	O
publishers	O
.	O
</s>
<s>
It	O
also	O
catalogs	O
identities	O
like	O
Wikidata	O
,	O
OpenLibrary	B-Library
,	O
Goodreads	B-Application
,	O
LibraryThing	B-Library
and	O
ISBN	B-Library
IDs	O
for	O
entities	O
.	O
</s>
