Hi Mark,
These are very open ended questions, and are probably best answered by
reading some of the documentation for DB XML.
Introduction to Berkeley DB XML:
http://www.sleepycat.com/xmldocs/intro_xml/BerkeleyDBXML-Intro.pdf
Getting Started Guide:
http://www.sleepycat.com/xmldocs/gsg_xml/cxx/index.html
C++ API Documentation:
http://www.sleepycat.com/xmldocs/api_cxx/frame.html
DB XML also implements XQuery as it's query language. There are lots of
articles onthe internet about how to use XQuery, but here are some to
get you going:
http://www.w3.org/XML/Query/#other
John Snelson
Mark Robert Salamon wrote:
I had two questions related to metadata-based queries. first, what
operators are available? I'm sure that the =, >, etc. queries are
available. Are any of the following SQL-like operators available (or
their equivalent), and can someone show me an example of each:
between
is null
is not null
in(a,b,c...)
substring()/like -- and any wildcard or regex characters
Second, how do you combine multiple queries together (metadata or
regular ones), and can you provide examples. For example, if I want to
look for documents with metadata author='jsmith' and date-created >
2005-01-01, how would I do that? similar if i'm combining metadata and
regular queries at once. in other words, are the AND and OR operators
available for querying metadata and xml data and what is the syntax like.
Thanks!
--
John Snelson, Berkeley DB XML Engineer
Sleepycat Software, Inc
http://www.sleepycat.com
Contracted to Sleepycat through Parthenon Computing Ltd
http://blog.parthcomp.com/dbxml
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