How To Read This Chapter

This chapter is organized by broad topics, including selecting data by directed queries and browsing; retrieving, filtering, transforming, and analyzing data; assessing data quality; entering, organizing, and annotating data; and additional analysis tools for registered users. The first few topics are treated in more detail, since they are of more interest to "public" (i.e., unregistered) users.

Each tool described is prefaced with instructions for navigating to the tool via the Web interface available from SMD as of April 2005. Figure 1 shows the critical navigational tools in the context of the SMD home page.

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