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4.3 Level 2: Semi-regular Patterns
Figure 1 – Simplified FST Script
The purpose of Level 2 is to compile inflectional forms that are dependent on other
forms (introduced in Level 1), and to provide default inflections for regular screeve
formation patterns.
An example of the first case is the Conditional screeve, formed predictably from
the Future screeve. The FST algorithm is as follows:
• Compile a network consisting of Future forms;
• Add the appropriate inflectional suffixes (-di for 1st and 2nd person
subject, -da for 3rd person subject);
• Replace the screeve property “+Fut” with “+Cond”; and
• Add the inflectional properties where needed.
The replacement of screeve properties is done using the ‘substitute symbol’
command in xfst; other operations are performed using simple concatenation
commands.
An example of the latter is the addition of 3Pl Subject forms of the Present screeve.
The default suffix is –en, which is added to all verbs unless an exception is specified
at Level 1. The basic algorithm is as follows:
• Compile a network of Present forms, excluding the forms for which both
3Pl Subject forms are already specified;
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