Engineering tag extraction

Every tag read from the project's documents, with the reading confidence and the grammar confidence kept apart.

Demonstration project - no figure here describes a real facilityChanges are not saved

Why

Each candidate is a real reading, normalised against the project's own tag grammar. The combined confidence is the product of the two, not their average.

Writes are validated against the engineering rules and then refused, because no database has been configured for this environment.

Tag readings

131

Recognised by the grammar

127

In a register

128

With a problem

Lowest combined

36%

Tag readings (131), weakest first
As read	Normalised	Class	From	Reading	Grammar	Combined	Problem
PT-120I	unchanged	instrument	ZRF-PID-1101	40%Unverified	90%Unverified	36%Unverified	a near-duplicate finding that blocks use of both readings
HV-1203	unchanged	valve	ZRF-PID-1202	40%Unverified	93%Unverified	37%Unverified	a superseded-only finding that blocks use
P-1299X	unchanged	equipment	ZRF-PID-1202	40%Unverified	95%Unverified	38%Unverified	a not-in-register finding that blocks anything the tag would state
PT-1201	unchanged	instrument	ZRF-PID-1201	50%Unverified	90%Unverified	45%Unverified	a near-duplicate finding that blocks use of both readings
PT-1201	unchanged	instrument	ZRF-PID-1201	50%Unverified	90%Unverified	45%Unverified	a near-duplicate finding that blocks use of both readings
PT-1201	unchanged	instrument	ZRF-DS-PT-1201	50%Unverified	90%Unverified	45%Unverified	a near-duplicate finding that blocks use of both readings
PT-1201	unchanged	instrument	ZRF-REG-II-001	50%Unverified	90%Unverified	45%Unverified	a near-duplicate finding that blocks use of both readings
HV-3101	unchanged	valve	ZRF-PID-3101	50%Unverified	93%Unverified	47%Unverified	a placement conflict in which nothing is chosen and the drawn boundary is never promoted
HV-3101	unchanged	valve	ZRF-REG-VR-001	50%Unverified	93%Unverified	47%Unverified	a placement conflict in which nothing is chosen and the drawn boundary is never promoted
P-1201A	unchanged	equipment	ZRF-PID-1201	50%Unverified	95%Unverified	48%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
P-1201A	unchanged	equipment	ZRF-PID-1201	50%Unverified	95%Unverified	48%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
P-1201A	unchanged	equipment	ZRF-PFD-1200	50%Unverified	95%Unverified	48%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
P-1201A	unchanged	equipment	ZRF-DS-P-1201A	50%Unverified	95%Unverified	48%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
P-1201A	unchanged	equipment	ZRF-REG-EQ-001	50%Unverified	95%Unverified	48%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
E-1217	unchanged	equipment	ZRF-REG-EQ-001	50%Unverified	95%Unverified	48%Unverified	a never-drawn finding, reported as a question rather than a fault
12-CD-1201-150-A1A	unchanged	line	ZRF-PID-1201	50%Unverified	97%Unverified	49%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
12-CD-1201-150-A1A	unchanged	line	ZRF-PID-1201	50%Unverified	97%Unverified	49%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
12-CD-1201-150-A1A	unchanged	line	ZRF-REG-LL-001	50%Unverified	97%Unverified	49%Unverified	a safety-critical attribute conflict that presents no value and blocks approval
PT-1101	unchanged	instrument	ZRF-PID-1101	60%Unverified	90%Unverified	54%Unverified	In the register
LT-1110	unchanged	instrument	ZRF-PID-1101	60%Unverified	90%Unverified	54%Unverified	In the register
AT-1105	unchanged	instrument	ZRF-PID-1101	60%Unverified	90%Unverified	54%Unverified	In the register
PSV-1110	unchanged	valve	ZRF-PID-1101	60%Unverified	93%Unverified	56%Unverified	In the register
V-1110	unchanged	equipment	ZRF-PID-1101	60%Unverified	95%Unverified	57%Unverified	In the register
K-1120	unchanged	equipment	ZRF-PID-1101	60%Unverified	95%Unverified	57%Unverified	In the register
11-NG-1101-300-B2B	unchanged	line	ZRF-PID-1101	60%Unverified	97%Unverified	58%Unverified	In the register
PT-3101	unchanged	instrument	ZRF-PID-3101	70%Unverified	90%Unverified	63%Unverified	In the register
TT-3102	unchanged	instrument	ZRF-PID-3101	70%Unverified	90%Unverified	63%Unverified	In the register
C-60101	unchanged	cable	ZRF-SLD-6001	80%Unverified	80%Unverified	64%Unverified	In the register
C-60102	unchanged	cable	ZRF-SLD-6001	80%Unverified	80%Unverified	64%Unverified	In the register
C-60201	unchanged	cable	ZRF-SLD-6001	80%Unverified	80%Unverified	64%Unverified	In the register
P-3101A	unchanged	equipment	ZRF-PID-3101	70%Unverified	95%Unverified	66%Unverified	In the register
P-3101B	unchanged	equipment	ZRF-PID-3101	70%Unverified	95%Unverified	66%Unverified	In the register
T-3110	unchanged	equipment	ZRF-PID-3101	70%Unverified	95%Unverified	66%Unverified	In the register
31-CW-3101-400-C1C	unchanged	line	ZRF-PID-3101	70%Unverified	97%Unverified	68%Unverified	In the register
31-CW-3102-400-C1C	unchanged	line	ZRF-PID-3101	70%Unverified	97%Unverified	68%Unverified	In the register
LT-1210	unchanged	instrument	ZRF-PID-1201	80%Unverified	90%Unverified	72%Unverified	In the register
PSH-1201	unchanged	instrument	ZRF-PID-1201	80%Unverified	90%Unverified	72%Unverified	In the register
LT-1210	unchanged	instrument	ZRF-PID-1201	80%Unverified	90%Unverified	72%Unverified	In the register
PSH-1201	unchanged	instrument	ZRF-PID-1201	80%Unverified	90%Unverified	72%Unverified	In the register
PT-1202	unchanged	instrument	ZRF-PID-1202	80%Unverified	90%Unverified	72%Unverified	In the register
TT-1203	unchanged	instrument	ZRF-PID-1202	80%Unverified	90%Unverified	72%Unverified	In the register
FT-1204	unchanged	instrument	ZRF-PID-1202	80%Unverified	90%Unverified	72%Unverified	In the register
PT-1202	unchanged	instrument	ZRF-PID-1202	80%Unverified	90%Unverified	72%Unverified	In the register
TT-1203	unchanged	instrument	ZRF-PID-1202	80%Unverified	90%Unverified	72%Unverified	In the register
FT-1204	unchanged	instrument	ZRF-PID-1202	80%Unverified	90%Unverified	72%Unverified	In the register
PT-3201	unchanged	instrument	ZRF-PID-3201	80%Unverified	90%Unverified	72%Unverified	In the register
HV-1201	unchanged	valve	ZRF-PID-1201	80%Unverified	93%Unverified	74%Unverified	In the register
LCV-1210	unchanged	valve	ZRF-PID-1201	80%Unverified	93%Unverified	74%Unverified	In the register
PSV-1210	unchanged	valve	ZRF-PID-1201	80%Unverified	93%Unverified	74%Unverified	In the register
CV-1201	unchanged	valve	ZRF-PID-1201	80%Unverified	93%Unverified	74%Unverified	In the register

Showing 1 to 50 of 131 readings

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Two uncertainties, multiplied

A tag has been through two steps that can each be wrong: something read the characters, and something decided they form a tag. A character read at 0.6 that the grammar accepts at 0.9 is wrong if either step was - so the combined figure is 0.54, not 0.75. Averaging would let a confident grammar rescue an unreliable reading, which is how PT-120I becomes PT-1201.

Verify a reading

Normalisation is not correction

The grammar reformats PT1201 to PT-1201 because the project’s convention has a hyphen. It does not change a character it thinks was misread: repairing PT-120I to PT-1201 would silently resolve the exact ambiguity the exception register exists to raise.