I found Genominator very useful to store NGS data. However, I have a question concerning the data model. Data are saved in Genominator as: chr INTEGER, strand INTEGER, location INTEGER Although I can exchange X, Y and MT chromosome labels with INTEGERS, I wonder if the chr definition can be changed from INTEGER to CHARACTER. Cheers Raffaele ---------------------------------------- Prof. Raffaele A. Calogero Bioinformatics and Genomics Unit Dipartimento di Scienze Cliniche e Biologiche c/o Az. Ospedaliera S. Luigi Regione Gonzole 10, Orbassano 10043 Torino tel. ++39 0116705417 Lab. ++39 0116705408 Fax ++39 0119038639 Mobile ++39 3333827080 email: raffaele.calogero at unito.it raffaele[dot]calogero[at]gmail[dot]com www: http://www.bioinformatica.unito.it Info: http://publicationslist.org/raffaele.calogero