A weave needs to be demonstrated. In the AOL there probably was a specific graphic nomenclature used, probably like electronic schematics today. But obviously that has been long lost, and it would stretch my "suspension of disbelief" bounds past breaking if something like that had survived when literacy itself barely did. Don't foget that there are only minor differences between the weave that opens into T'A'R and the weave for Traveling, but rather different results. And even if "weaving schematics" survived, no one in 3rd Age Wotverse knows how to read them, or even recognise them, except the Forsaken.

NaCl(to be passed on a weave needs to be seen)H2O