### 4.8.5 Ssi links

Ssi (simple singular interface) links give the possibility to store and communicate data betweenm Singular processes: Read and write access is very fast compared to ASCII links. Ssi links can be established using files or using TCP sockets. For ring-dependent data, a ring description is written together with the data. Reading from an Ssi link returns an expression (not a string) which was evaluated after the read operation. If the expression read from an Ssi link is not from the same ring as the current ring, then a `read` changes the current ring.

Currently under development - not everything is implemtented.

> 4.8.5.1 Ssi file links |  |
> 4.8.5.2 Ssi tcp links |  |

User manual for Singular version 4-0-3, 2016, generated by texi2html.