Definition: Common-output asymptotic construction

An information endpoint requires identifications $S_t$ into one fixed complete output space ${\mathcal{H}}_{R_{\mathrm{out}}}\otimes {\mathcal{H}}_{B_{\infty }}$ such that

on every code vector. The identifications must specify outgoing access and every inaccessible output. They may express a derived scattering representation; they may not be chosen as new operations that release the residual code.