The database records morphological mismatches along two parameters: the features involved in deponency and the distribution of the mismatch in the paradigm or lexicon.

There are two main menus for executing a search which permit both broad and narrow searches. In each case, moving rightward in the menu tree will refine the search results diplayed. When the desired degree of specificity is reached, the user clicks on the highlighted option. For example, the user can search for all examples involving morphosyntactic features by clicking on the highlighted 'Morphosyntax' option from the 'Feature' menu. Or, the user can narrow the search to a particular family of morphosyntactic features, such as TAM by selecting this option from the sub-menu. Within the realm of TAM, the user can further specify a particular morphosemantic feature, e.g. Aspect.

Searching by features

The features menu provides the opportunity to show all records in the database or to refine the results by two main parameters:

• Morphosyntax: The morphosyntax function allows users to refine the search results by selecting the morphosyntactic feature that is relevant to the mismatch between the apparent morphosyntactic value of a morphological form and its actual value in a given syntactic context
• Word class: The word class function allows users to refine the search results by selecting a particular part of speech or combination of parts of speech.

Searching by domain

The domain menu contains a primary division between three types of domains in  which mismatches occur:
• Lexical: The mismatch affects certain feature values only for a specified set of lexemes. E.g. deponents in Latin are a lexically specified set of verbs with passive forms for active values.
• Lexical-paradigmatic (semi-deponent) : The mismatch only for a specified set of lexemes, and only in the presence of certain other feature values. E.g. Latin semi-deponents are like the deponents described above, but only when the value of the TAM feature is 'perfect' (alternatively expressed, only in forms based on the perfect stem).
• Paradigmatic: the mismatch affects certain feature values only in the presence of certain other feature values, but is not restricted to a specified set of lexemes. E.g. in Chukchi, antipassive forms are used in the paradigm of all transitive verbs, but only for certain person values, and only for certain TAM values.
Both the lexical-paradigmatic (semi-deponent) and pure paradigmatic type crucially involve a conditioning feature, i.e. that feature whose values the mismatch is restricted to (e.g. TAM for Latin semi-deponents, person and TAM for Chukchi paradigmatic deponents). The search menu allows the user to specify the conditioning feature.

Combined search

Both 'Feature' and 'Domain' searches may be combined. For instance, having searched for a particular feature, one may continue to refine the search by selecting a particular domain, or vice versa.