Apart from the characters and symbols that are used in the .ort format in the prosodic transcription use is made of an extra symbol set to indicate prosodic phenomena:
|| | Represents a strong break. | ja dat weet ik || maar wanneer ik ben bij de politie||commissaris ontboden |
| | Represents a weak break. | jan | en ook piet dit is werkelijk on|ge|looflijk |
^ | The vowel part of a prominent syllable is indicated by the '^'-symbol on either side. | ^i^k ben thuis het is ^eeu^wen gel^e^den |
% | An unusual lengthening of a sound, without giving prominence to the syllable, is indicated by means of the percentage symbol ('%'). | %ja% || maar dat is verk^ee^rd hij is pas viere%n%d^e^rtig |
Strong and weak breaks ('|' and '||' resp.) are enclosed between blank spaces unless they occur word-internally.
For a more detailed description of the .pro format see the Protocol voor de prosodische annotatie (Martens 2002); here available in .ps and .pdf format (Dutch only).