# this shows how constraints work.  
https://ppi.pds.nasa.gov/ditdos/inventory?sc=Galileo&o=txt

# here is a listing of available products.
https://ppi.pds.nasa.gov/ditdos/view?id=pds://PPI/CO-V_E_J_S_SS-RPWS-2-REFDR-ALL-V1.0/DATA/RPWS_RAW_COMPLETE&times=false

# here is a request for a dataset.
#dataset = top-level collection of products.
#id= identifies the location of the LABEL and TABLE
#product =  one LABEL and TABLE file (or any data files within the dataset).
#param = one plottable set of data.
https://ppi.pds.nasa.gov/ditdos/write?f=vo&id=pds://"+id;

https://ppi.pds.nasa.gov/ditdos/write?f=vo&id=pds://PPI/CO-E_J_S_SW-CAPS-2-UNCALIBRATED-V1.0/DATA/CRUISE/2004/092_121_APR/2004093/ACT_200409300_1  works
https://ppi.pds.nasa.gov/ditdos/write?f=vo&id=pds://PPI/maven.mag.calibrated/data/pc/2014/11/mvn_mag_l2_2014305pc_20141101_v01_r01.sts   Does not.