Let's look at one of the names as an example.
I-Dl-2rg2ar-2as 8t 1rb 2c-heavy
I – thruster type, if there are no thrusters, the blueprint type will be indicated.
D – blueprint type (D - drone).
l – (L) suffix indicating the grid size.
2rg2ar – fixed weapons, if there are none, then there will be a dash instead, for example: --2as.
2as – turrets.
8t – number of thrusters.
1rb 2c – number and type of additional blocks ("1 rb" - 1 reactor, battery, "2c" - 2 containers).
-heavy – blueprint name.

Using the in-game search, you can find blueprints with the desired characteristics, for example:
"I-" – all blueprints with ion thrusters.
"-Dl" – all drones on a large grid.
"l-" – all blueprints on a large grid.
"rg" – all blueprints with railguns.
"2ar" – all blueprints with two artillery guns.
"--" – all blueprints without forward weapons.

You can also combine search queries, for example: "I- 2as" or "-Dl 8t".

If there are several types of thrusters in the blueprint, the tags will be arranged in the same order as in the table.

If a blueprint is designed for multiple players, then after its tag there will be a suffix consisting of a dash, the letter "x", and a number indicating the number of players the blueprint is designed for, for example "CV0-x2". You can ignore this suffix if you play single player or the PCU limit is not a problem for you.

If there are multiple weapons in a blueprint, the tags will be in the same order as in the table (from largest weapon to smallest).

If the number of blocks is the same, they will be combined into a group (for example: 1rbc). If the drawing contains several types of additional blocks, the tags will be arranged in the same order as in the table.