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bip-path-templates: describe Wildcard index range

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Dmitry Petukhov 2021-05-11 17:10:09 +05:00
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@ -98,6 +98,7 @@ Each section consists of ''index template'', optionally followed by the hardened
Index template can be: Index template can be:
* An integer value from 0 to 2147483647 ("Unit index template") * An integer value from 0 to 2147483647 ("Unit index template")
* A single "*" character, which denotes any value from 0 to 2147483647 ("Wildcard index template")
* The <nowiki>"{"</nowiki> character, followed by a number of ''index ranges'' delimited by commas (","), followed by <nowiki>"}"</nowiki> character ("Ranged index template") * The <nowiki>"{"</nowiki> character, followed by a number of ''index ranges'' delimited by commas (","), followed by <nowiki>"}"</nowiki> character ("Ranged index template")
Implementations MAY limit the maximum number of index ranges within the Ranged index template. Implementations MAY limit the maximum number of index ranges within the Ranged index template.
@ -113,11 +114,16 @@ For Non-unit range, value on the left side of the "-" character is the range_sta
For Unit range, we say that range_start is equal to range_end, even though there is no start/end in the Unit range. For Unit range, we say that range_start is equal to range_end, even though there is no start/end in the Unit range.
Unit index template contains a single index range, which is the Unit range
Wildcard index template contains a single index range, and we say that its range_start is set to 0 and its range_end is set to 2147483647
Constraints: Constraints:
# To avoid ambiguity, whitespace MUST NOT appear within the path template. # To avoid ambiguity, whitespace MUST NOT appear within the path template.
# Commas within the Ranged index template MUST only appear in between index ranges. # Commas within the Ranged index template MUST only appear in between index ranges.
# To avoid ambiguity, an index range that matches a single value MUST be specified as Unit range. # To avoid ambiguity, an index range that matches a single value MUST be specified as Unit range.
# To avoid ambiguity, an index template that matches any value from 0 to 2147483647 MUST be specified as Wildcard index template
# For Non-unit range, range_end MUST be larger than range_start. # For Non-unit range, range_end MUST be larger than range_start.
# If there is more than one index range within the Ranged index template, range_start of the second and any subsequent range MUST be larger than the range_end of the preceeding range. # If there is more than one index range within the Ranged index template, range_start of the second and any subsequent range MUST be larger than the range_end of the preceeding range.
# To avoid ambiguity, all representations of integer values larger than 0 MUST NOT start with character "0" (no leading zeroes allowed). # To avoid ambiguity, all representations of integer values larger than 0 MUST NOT start with character "0" (no leading zeroes allowed).