1. Enter a topic with some tags, e.g. <i>Sons and Lovers</i> where <i> and </i> stand for italic.
2. To make sure that this topic sorts correctly, set its sortOrder field to Sons and Lovers.
3. Add two character styles:
a. one called e.g. 'italic', in which you set italic,
b. one called 'hidden', in which you set the point size to 0.1, horizontal scaling to 1%, and colour to [None].
4. In the paragraph style you use for your index, add two grep styles:
a. apply the italic style to <i>.+?</i>
b. apply the character style 'hidden' to </?i>
Those tags will be well and truly hidden, they'll take about 0.001 points space.
Peter
