Cannot match blank indicator

[nichtich]

How do you select a field with blank indicator?

[phochste]

You need to add quotes to map indicators. Catmandu is aggresive trying to interpret strings firsts as JSON paths.

E.g.

marc_map("300[ , ]a",test)
retain(test)

[nichtich]

Nope, this does not work. I've added a test in branch issue-107. I'd prefer to use _ and # as alias for blank indicator but this likely clashes with #109.