6.5.1. Anaphora is an instance of an expression referring to another, the weak part of the deixis. In general, an anaphoric is represented by a pro-form or some kind of deictic. They usually don't have adjectival use, and are only used as mere abbreviating substitutes of the noun.
NOTE. The old anaphorics are usually substituted in modern Europaio-derived languages by demonstratives.
They are usually integrated into the pronoun system with gender; only occasionally some of these anaphorics have been integrated into the Personal Pronouns system in the IE derived languages.
6.5.2. Europaio has a general anaphoric pronoun based on a root i. It can also be added to old e forms, hence ei.
NOTE. This root i is also the base for the relative jo.
6.5.3. The other demonstrative, so/to, also functions as anaphoric but tends to appear leading the sentence, being its origin probably the relative.
These forms are also used for the second term in comparisons.
NOTE. Modern IE languages have sometimes mixed both forms to create a single system, while others maintain the old differentiation.