Different modeling approaches are employed depending on the timescale of conformational averaging, such as slow or fast chemical shift exchange (Figure ). These include generating single-state or multistate models for each set of slowly exchanging resonances , deconvoluting information in spectra of rapidly-exchanging systems , fitting to spectral features of intermediate exchange , and matching chemical shifts of slowly-exchanging states to chemical shifts predicted from known structures . Various methods of data interpretation will generate different numbers of chemical shift lists, restraint lists, and coordinate sets, which need to be accounted for in creating the archived data structure.