Isotonicity score

In some cases it might be that property values for all species in a reaction network are not available. Even in such cases one can make an isotonicity score, just by taking into account neighbour pairs (or equivalently the number of covering relations) of species such that property values for both are known. Thus for instance, if the property value for the hexa-substituted species (r()Cl6) were not available, then the remaining available number of neighbour pairs would be 19, as in Fig. 4. Thence the property score for this figure is seen to be 19/19. 

Table 1. Properties and Their Isotonicity Scores for Chloro-Benzenes...

These properties, their posetic manifestation, and their isotonicity scores were reported, and the results for chloro-benzene properties are reproduced in Table 1. For most properties isotonicity scores were fairly high, with several being perfect. There are a few properties which exhibit lower isotonicity scores - these properties include melting point, heat of fusion, and... 

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