Hi all,

I am trying unsuccessfully to link properties to values depending on columns in 
two tables. Here is an example (the database I work with is unfortunately not 
normalized).

I have a usage logs for instrument in my lab. Here are two tables:

Table 1: columns logID, researcher, date
Table 2: columns logID, instrument_name, instrument_manufacturer, filter_used

Every time an experiment is made, it gets an ID, name of researcher and date, 
such as

1       Melanie         20130221
2       Ryan            20111101

Every time an experiment is made, a flow cytometer is used, such as
1       FacsAria        BD                              filter 1
1       BioSorter       UBiometrica             filter 72
2       FacsAria        BD                              filter 5


The instrument name and manufacturer are always linked (all FacsAria are 
manufactured by BD), but the type of filter used depends on the experiment 
performed (i.e., the logID) *and* the instrument name. So for example return 
filter 1 only if logID = 1 *and* name is FacsAria. (as seen in the other 
record, I could use the FacsAria with another filter, filter5, in another 
experiment)

Also, several different instruments can be used within one experiment, such as 
in the example above where in experiment one two instruments (therefore two 
filters) were used.

I created a classMap per logID, and a classMap per instrument. As I am using 
the instrument name to mint the URI, all records of FacsAria show up on the 
same page - which displays "has_filter 1, has_filter 2" without associating the 
correct filter with the correct logID. I chose to do it that way as I can then 
have a FacsAria page showing me all the experiments it was used in.
Maybe the right way to proceed would be to create a classMap for each couple 
"InstrumentName-logId" and add the propertyBridge to those. I couldn't get the 
correct pattern to urlify though: if I try 
@@Table2.InstrumentName-Table1.logID|urlify@@ it gives me an error. I am also 
unsure how to link that to the "general" FacsAria above.

I thought maybe the example at http://d2rq.org/d2rq-language#example-refers 
would help, but nothing shows up when I try and adapt it to my case (either in 
the browser or the dump file)

I am not sure how to get that mapping right - any suggestion?

Thanks,
Melanie


ps: I hope this email is clear; I tried to reduce my example to the minimum 
information needed to understand the problem. Apologies if it is somewhat hard 
to read or if information is missing.



---
Mélanie Courtot
MSFHR/PCIRN Ph.D. Candidate,
BCCRC - Terry Fox Laboratory - 12th floor
675 West 10th Avenue
Vancouver, BC
V5Z 1L3, Canada











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