The goal of JSON Schema Profile is to augment the vocabulary of JSON Schema to represent properties of the data as opposed to focusing only on the structure.
This is a string which represents a serialized Bloom filter. Currently this is a Base64 encoded serialized value of the specific Bloom filter class used by JSONoid, but we plan to make this a more reusable format.
Bloom filters are useful to check if specific values were observed for a particular property without the need to store all the values.
| property |
description |
bins |
An array of two-element arrays where the first element is the mean of the bin and the second is the number of elements in the bin |
hasExtremeValues |
A Boolean indicating whether the histogram contains values which cannot be represented in the given bounds. This usually only occurs for extremely large absolute values and is rarely observed in practice |
| property |
description |
variance |
The variance of all values of this property |
stdev |
The standard deviation of all values of this property |
skewness |
The skewness of all values of this property |
kurtosis |
The kurtosis of all values of this property |
| property |
description |
lengthHistogram |
A histogram of array lengths |
| property |
description |
pctTrue |
Percentage of the Boolean values which are true |
| property |
description |
bloomFilter |
A Bloom filter of integer values |
distinctValues |
An estimate of the number of distinct values (cardinality) of this property |
histogram |
A histogram of integer values |
statistics |
A set of statistics of integer values |
| property |
description |
bloomFilter |
A Bloom filter of number values |
distinctValues |
An estimate of the number of distinct values (cardinality) of this property |
histogram |
A histogram of number values |
statistics |
A set of statistics of number values |
| property |
description |
fieldPresence |
An object where the value represents the percentage of the time the corresponding key appears |
| property |
description |
bloomFilter |
A Bloom filter of string values |
distinctValues |
An estimate of the number of distinct values (cardinality) of this property |
lengthHistogram |
A histogram of string lengths |