This help document answers the following questions:
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 http://www.informatics.jax.org. You can contact User Support by e-mail or by phone at (207) 288-6445.
A general procedure to build a query includes the following steps (select form, enter value(s), choose output, restrict/expand scope, execute).
The query returns any marker on Chr. 6 whose symbol, name or synonym begins with hox.
The query results are usually a list of records in an abbreviated format. The display contains links to related information in the MGI database.Top
A good search strategy ensures that your search executes quickly and retrieves the information you want. Here are some general guidelines:
When you use multiple fields, the interpretation is "Search for all records that contain attribute A AND attribute B AND ...."
Author Nadeau JHand specify
Year 2010-to further focus your search.
Many query results now allow you to modify your search and requery. Use the Click to modify search button to view your previous search parameters and make refinements.
Alternately, many Query Forms allow you to filter your results. So in the previous search, you could filter JH Nadeau's publications to just those published in Mamm Genome.
Yes. The following query forms have fields that provide full-text search options:
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.
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.
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 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 .
Comparison operators are found only on the Mouse SNP Query Form and provide a means to focus your search on a range or subset of records in the database. The following table describes the set of comparison operators used with numeric fields:
|=||is equal to (the DEFAULT value in all cases)|
|>||is greater than|
|<||is less than|
|>=||is greater than or equal to|
|<=||is less than or equal to|
|<>||is not equal to|
|is null||has no value (NOT equivalent to a value of "0")|
Text fields on the Mouse SNP Query Form accept alphanumeric characters. The table below lists the set of comparison operators for text fields:
|BEGINS||begins with xxx|
|ends||ends with xxx|
|contains||contains the sequence xxx anywhere|
|like ||partial match (MUST use 1 or more
Select NOT to exclude a value or set of values.
Use wild cards only with the LIKE operator; do not use wild cards with BEGINS, ENDS, CONTAINS, or =.
Below is a list of wild cards to use with LIKE:
|%||May be any string of 0 or more characters|
|_(underscore)||May be any single character|
|[a..n] ||May be any character in the range of a to n|
|[abc] ||May be any one of a, b, or c|
You can put a wild card symbol after or within the text you enter in the search field.
The following are examples of using wild cards to search for information on a marker by its symbol.
|Abc%||all of the ATP-binding cassette genes|
|Abc[ab]%||ATP-binding cassette genes, sub-families A and B|
|Abc_1||Abca1, Abcb1, Abcc1, Abcd1, Abce1, Abcf1, Abcg1|
|D%Mit%||all of the MIT markers|
If the string you are searching for contains a wild card character (%, _,[a,b,c]), you can still use the LIKE operator and treat the embedded wild card character as a literal, i.e., as ordinary text. To do so, enclose the embedded wild card character in square brackets [ ]. For example, suppose you want to search for strings containing the [ character. You could use LIKE and enter the search string %[%. (Translation: any string of characters, followed by a [, followed by any string of characters. Of course, for this example, you could also use the CONTAINS operator, with the search string [.)Top
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.Top
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.Top
Yes. The setting for the font size on MGI web pages is specified in a style sheet. If you use Internet Explorer (IE), you can override this by doing the following:
Now you can increase (or decrease) the font sizes. To do this: