General Guidelines for MGI Query Form Searches

This help document answers the following questions:

See also:

Where can I find help using MGI query forms?

MGI is accessible on the Internet via the World Wide Web (WWW) and relies on online forms to present query options in an easy-to-use format. Help documentation is available on-line (click Help under the MGI logo). Our Mouse Genome Informatics home page is located at You can contact User Support by e-mail or by phone at (207) 288-6445.

Is there a general method of querying the MGI databases?

A general procedure to build a query includes the following steps (select form, enter value(s), choose output, restrict/expand scope, execute).

The query results are usually a list of records in an abbreviated format. The display contains links to related information in the MGI database.


What is a good search strategy?

A good search strategy ensures that your search executes quickly and retrieves the information you want. Here are some general guidelines:


Can I do a full-text search on any of the forms?

Yes. The following query forms have fields that provide full-text search options:


What are the parts of a query form?

A query form consists of a logical arrangement of data entry fields, selection lists, and various options and operators used to modify the search criteria or to format query results. Field names are linked to user documentation describing the fields; click any field name to go to the relevant part of the documentation.

The subsections below describe form elements.


Selection lists

A selection list consists of a pre-defined list of values from which you may select one or more items. An example is the list of Chromosomes on some query forms. To limit your search to specific chromosomes, you make your selections from the list. How you make the selection depends upon the browser you use.

Some selection lists allow you to specify more than one value. For example, you may wish to search for multiple chromosomes. In this case, you would select several options from the selection list. Again, the exact mechanism for doing this depends on your implementation.

Data entry fields

A data entry field requires you to type a value in the field. There are two types of data entry fields, numeric and text.

Numeric fields

Numeric fields require that you enter a number, possibly in a specified format. For example, the Year field in the Reference query form requires the year to be entered in the format: 20xx .

Wild card and text

MGI supports the asterisk a wild card symbol before or after the text you enter in the search field.
The following are examples of using the wild card to search for information on a marker by its symbol.

Enter To Find
Abc* all of the ATP-binding cassette genes
Abc[ab]* ATP-binding cassette genes, sub-families A and B
*rik all RIKEN cDNA genes


Can I view the results of a query in different ways?

The query forms offer several options for ordering query returns. For example, on the Genes and Markers Query Form you can specify that the returned list of markers be sorted by cM position or by Nomenclature. Choose the sort order by selecting the appropriate option from the list. For more details, refer to the documentation for specific forms. At the present time, multilevel sorting is not an option.


Can I print or save the results of my query?

Options for printing and saving files vary with computer platform and browser. Refer to your browser and system documentation for information on how to print results or save them to a file.