3.2 Query Language ¶

The evr-attr-index server can be queried for seed claims which match a certain criteria.

You can either use the emacs evr.el module to perform searches or connect to the evr-attr-index server using a TLS aware client like socat.

A complete search expression is made up of three optional parts:

• An attribute selector which declares the attributes that are reported for the matching seed claims.
• Conditions which must be fulfilled for each found seed claims.
• General search constraints like the effective time which should be used for the query and more.

A complete search query can look like this:

select * where my-key=my-value && other-key=other-value at 2022-04-01T12:01:02.123000Z

The query above will find every seed claim which has the mattching keys and values. The search is executed as if it was the first of April in 2022. Every attribute of the found seed claims will be reported.