52 lines
1 KiB
Markdown
52 lines
1 KiB
Markdown
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Language documentation for the imag-ids query language
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======================================================
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The query language imag-ids supports is rather simple.
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It can be used to filter the printed imag ids by the values in the header of the
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entries. It has no way to access the content of the entries (yet).
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Following is a BNF-like structure shown how the language definition works.
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This definition may change over time, as the language grews more powerful.
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```ignore
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query = filter (operator filter)*
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filter = unary? ( (function "(" selector ")" ) | selector ) op val
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unary = "not"
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op =
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"is" |
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"in" |
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"==" |
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"eq" |
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"!=" |
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"neq" |
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">=" |
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"<=" |
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"<" |
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">" |
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"any" |
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"all"
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val = val | listofval
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val = string | int | bool
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listofval = "[" (val ",")* "]"
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operator =
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"or" |
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"or_not" |
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"and" |
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"and_not" |
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"xor"
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function =
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"length" |
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"keys" |
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"values"
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```
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A "string" quoted with double-quotes.
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A "val" does not yet support floats.
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