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ISBN: 978-972-8939-25-0 © 2010 IADIS(e.g. continous, restrained etc.). As for the Directionality, the sign may be unidirectional or bidirectional,according to Ferreira-Brito.The Plane XYZ [Capovilla & Sutton (2009)] is utterly suitable for computational treatment. TheFrequency refers to whether there is or there isn´t repetition of the movement that forms the sign. Thenumber of repetitions may or may not be specified, but its presence indicates several meanings for that sign,such as the intensity. The values for the parameters are considered in reference to whom is executing thesign.The proposed model may be used in different representations, such as XML, Data Base or other datastructures deemed necessary for additional computational work. The Figure 2 shows the sign and table 1shows the XML for the sign “pagar à vista” to pay in cash. The Code shows its description based on theproposed model.Figure 2. Visual example of sign “pagar à vista” payment in cashThe sign “pagar à vista” is pictured here for example purposes only. Its XML code can be seen in table 1.Table 1. Example of sign “pagar à vista” (payment in cash)5. ANALYSYS, CONCLUSIONS AND FUTURE WORKSThis research uses phonological models described in the literature, used and known by the communities ofdeaf people, as basis for the proposal of a computational representation of signs in Libras, aggregating a highdegree of details that allow for addition of new parameters, sequentially of signs, dynamics of signs, amongothers. This completudeness is important for the processing (use of the knowledge as described by the modelfor image recognition, translation etc.) and for the execution (e.g. to generate 3D avatars).The descriptivepower of the model is evidenced by the correctness of the description of the exemplifying sign.A sample set of signs in Libras will be constructed (a step that is necessary and sufficient for videopattern recognition). Once each sign is properly recognized in its segments predicted by the model, then mostsigns in Libras will be indentifiable and describable automatically, for future works in different directions,such as the automatic generation of the writing of the signs, using SignWriting, for example.Unlike the literature, that approaches the structure of sign languages as mere spelling, or as static signs,and that doesn´t take into account the real needs of the deaf community, this article advances precisely on270