bip-path-templates: Add Compatibility section

Author: dgpv

bip-path-templates.mediawiki

@@ -197,6 +197,14 @@ At the moment, three implementations exist:
 * FSM implementation in Python (micropython compatible): https://github.com/dgpv/bip32_template_python_implementation
 * non-FSM implementation in python: BIP32PathTemplate class in bitcointx.core.key module of python-bitcointx library (https://github.com/Simplexum/python-bitcointx)
 
+==Compatibility==
+
+The full path template that only contains Unit index templates represents a fully valid BIP32 path.
+
+There's no other path template standards that is known to the author currently.
+
+There is a discussion on path templating for bitcoin script descriptors at https://github.com/bitcoin/bitcoin/issues/17190, which proposes the format '''"xpub...{0,1}/*"''', of which the '''"{0,1}/*"''' part would correspond to the partial path template in the format of this BIP.
+
 ==Examples==
 
 '''"m/{44,49,84}'/0'/0'/{0-1}/{0-50000}"''' specifies a full template that matches both external and internal chains of BIP44, BIP49 and BIP84 paths, with a constraint that the address index cannot be larger than 50000