The default (XAmple) parser is a computational tool that produces a morphological analysis for a given word form. You can choose it on the Parser menu.
Parsing words lists the required information that this parser uses to produce an analysis. Generally speaking, to produce a morphological analysis, the parser needs to do the following:
Find the affixes and stem(s) in the given word.
To do this, the parser needs to know forms (and glosses) of stems and affixes.
Apply "constraints" to make sure the affixes can go with the rest of the word (stem and other affixes):
Which affixes can go with which stems.
The relative order of the affixes.
When a particular shape of a form is legitimate or when it is not.
This parser uses an item and arrangement approach. The phonological rule-based parser uses an item and process approach.
Using this computational parser, or the phonological rule-based parser, contrasts with manually analyzing or manually glossing the words in a text.
It also contrasts with FieldWorks program-proposed analyses that are based on a previous user analysis that was manually done for an identically spelled word. These different analyses initially appear with different background colors.