FIELD GUIDESource-led reference

P064 / Coax / Connector

RP-SMA coaxial connector

RP-SMA changes the center-contact arrangement relative to ordinary SMA while retaining the same threaded interface. The RP prefix is not a claim that a signal is electrically inverted.

Also called RP-SMA RPSMA reverse polarity SMA

The outer thread alone cannot settle SMA versus RP-SMA.

Look for

Inspect the center contact and the shell together. The paired sketches illustrate the contact distinction, not dimensions, torque or an engineering mating specification.

Claim inspection dates: 2026-10-01, 2026-10-12 · Independent review pending

Image inspection / P064

See the view. Check its scope.

4 registered views for this reference. Different part examples are not automatically mates; all remain not to scale and independently unapproved.

RP-SMA cable-plug body / side profile of Amphenol RF 132113RP-10. Mating end left and termination right; the center contact is not shown. Original qualitative exterior only, not to scale. (private workspace)

P064 / Source-observed physical study

RP-SMA cable-plug body / side profile

Amphenol RF 132113RP-10

Orthographic side profile · Cable plug / cable end

Not to scale. Technical and rights review pending.

Inspect view & provenance (private workspace)
Concept table: standard SMA plug with pin and jack with socket; RP-SMA plug with socket and jack with pin. Thread position is identified separately. This is not a physical connector drawing. (private workspace)

P064 / Concept — not physical geometry

SMA / RP-SMA shell and center-contact logic

Conceptual four-case vocabulary, not a depicted part

Symbolic cross-reference, not a mating view · Concept only

Not to scale. Technical and rights review pending.

Inspect view & provenance (private workspace)
Concept diagram separates jack role, male center pin, standard thread direction and board termination without drawing connector geometry. (private workspace)

P064 / Concept — not physical geometry

132134RP / separate identity fields

132134RP source-field concept; no physical geometry

Conceptual arrangement of four source fields; no physical viewpoint · Concept only

Not to scale. Technical and rights review pending.

Inspect view & provenance (private workspace)
RP-SMA coaxial connector: Reverse-polarity contact convention. Example threaded plug-side front concept; contact convention, not a mating gauge. Qualitative source-linked recognition study, not a pinout or a dimensional guide. (private workspace)

P064 / Inherited recognition study

RP-SMA coaxial connector

RP-SMA coaxial connector

Example threaded plug-side front concept; contact convention, not a mating gauge · Cable plug / cable end

Not to scale. Technical and rights review pending.

Inspect view & provenance (private workspace)

Network notes / RF / coax / P064

What is reversed in RP-SMA?

FIELD NOTES 05

The center-contact convention is reversed relative to ordinary SMA while the outer threaded interface is retained. “Reverse polarity” here is not a statement that the RF signal is inverted, nor permission to connect any two matching shells.

Identify first

Read the part and the device.

Record outer coupling and center-contact role separately. Vendor plug/jack naming without the actual contact description can be misleading.

Still unresolved

Keep this requirement open.

The exact pair’s mating approval, cable match and electrical performance are not established by the RP-SMA name.

Not established · named example only

Do similar SMA and RP-SMA outer threads prove a suitable contact pair?

The outer thread does not establish compatible center-contact roles.

Boundary. No exact pair or manufacturer mating approval has been supplied.

Next check. Read both part drawings and center-contact descriptions.

S046 · S047 · C063A (private workspace) · C064A (private workspace)

Before choosing the cable or component

  1. Compare the manufacturer’s complete part descriptions and contact drawings.
  2. Confirm both contact role and outer coupling before choosing the mate.
  3. Verify the cable and equipment’s impedance and frequency requirements independently.
Read the evidence and its scope · 2 observations

C064A (private workspace) — RP-SMA changes the center-contact arrangement relative to ordinary SMA while retaining the same threaded interface. The RP prefix is not a claim that a signal is electrically inverted.

Named standard or manufacturer description only; procedural checks are editorial recommendations, not hardware tests.

S046 · S047

C063A (private workspace) — SMA is a threaded RF connector family. Amphenol distinguishes SMA from RP-SMA by the center-contact arrangement even though the threaded interface is retained.

Named standard or manufacturer description only; procedural checks are editorial recommendations, not hardware tests.

S046

Source interpretation is not independent engineering review, hardware testing, wiring advice or a public-release approval.

V117 / READER FIELD GUIDE / COAX & RF

Before you connect or replace

RP-SMA means a changed center contact

Amphenol distinguishes SMA from RP-SMA by the center-contact arrangement. Similar outer threading does not prove that both contacts will engage correctly.

Three checks and exact source trail ↗

Editorial decision guidance only. A connector identity or nominal pitch does not establish approved mating, safe wiring or a supported device combination.

Visual atlas / P064 / 2026

Recognize the right physical clue.

FIGURE · REVIEW PENDING
RP-SMA coaxial connector: Reverse-polarity contact convention. Example threaded plug-side front concept; contact convention, not a mating gauge. Qualitative source-linked recognition study, not a pinout or a dimensional guide.
Cable-end plug. Example threaded plug-side front concept; contact convention, not a mating gauge.

What to look for

Reverse-polarity contact convention

What the drawing does not prove

Small center circles depict the contact-convention distinction only; thread pitch and gender assignments are not specified.

Reverse-polarity concerns the center-contact convention, not signal polarity; inspect exact male/female part sheets.

No fabrication dimensions, conductor routing, guaranteed fit or device approval. For electrical, power and optical interfaces, follow the original equipment instructions.

Figure evidence, orientation & usage rights

Uses previously recorded V112 manufacturer claim/source inspections; October 2026 supplementary public-source spot checks are documented separately, not treated as a refreshed approval.

Original Port & Cable interpretive vector, no third-party photo, copied CAD, logo or vendor drawing. Third-party product photos, logos and source drawings are not redistributed. No independent technical or rights certification is claimed.

Original claim identifiers: C064A (private workspace). Legacy evidence dates and rights assessments remain as recorded.

The useful distinction

Recognize it. Then verify it.

RP-SMA changes the center-contact arrangement relative to ordinary SMA while retaining the same threaded interface. The RP prefix is not a claim that a signal is electrically inverted. [C064A]

Amphenol RF identifies 132134RP as a straight 50-ohm RP-SMA jack with PCB through-hole termination and soldered contact termination. [C064C]

The 132134RP specification page describes the coupling as threaded and the thread direction as Standard. [C064D]

TE’s cross-reference guide describes the Amphenol 132134RP entry as a jack with a male center pin. [C064E]

TE states that its cross-reference guide is for assessment and does not establish exact equivalence of competing products. [C064F]

Identify the documented form

Identify RP-SMA from shell and center-contact role, not the RP prefix alone.

  1. RP refers to the changed center-contact convention, not signal inversion. S046 · S047
  2. The cited Amphenol RP-SMA jack has a standard-direction thread and a source-described male center pin. S558 · S559
Documented identity facts; exact part and variant scope remains with each value
Nominal contactsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Positions / cavity spanNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Populated contactsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Connector roleplug; socket; socket (Amphenol 132134RP jack)S046 · S047 · S372 · S047 · S558Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. reverse-polarity coaxial plug and jack interface Exact part role and termination fields only; not a cable-crimp or panel-mount substitute.
Rows, pitch, dimensions, keying and view limits
Additional scoped facts; not a fabrication drawing or a mating approval
Contact rowsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact pitchNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Dimensions / axisNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Coupling / latchthreaded (Claim C064A); threaded (Claim C064B); threaded (Claim C064D); threaded (Amphenol 132134RP); threaded, standard thread direction (132134RP)S046 · S047 · S372 · S047 · S558 · S558Separate exact examples; retain each value’s source, role, axis and part scope. Named standard or manufacturer description only; procedural checks are editorial recommendations, not hardware tests. RP-SMA center-contact reversal and threaded-family context only; no universal system compatibility claim. The RP designation is not used as proof of a reversed thread direction. Thread dimensions and a mating-part approval are not supplied. Exact named example 132134RP: RP-SMA straight through-hole PCB jack. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No unobserved customer-drawing geometry.
Keying / polarizationNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
View conventionNot recordedNo qualified positive source view convention is normalized. Prior negative/schematic-only context is retained in variant_notes.
Contact gender / arrangementmale center contact (Amphenol 132134RP jack; TE cross-reference scope only)S559Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. The jack label and center-contact description are separate attributes. The exact Amphenol drawing remains uninspected; no shape or pin geometry is inferred.
Mountingthrough-hole (Claim C064C); straight PCB through-hole, solder contact (132134RP)S558 · S558Separate exact examples; retain each value’s source, role, axis and part scope. Exact part role and termination fields only; not a cable-crimp or panel-mount substitute. Exact named example 132134RP: RP-SMA straight through-hole PCB jack. Exact example only; no universal geometry, electrical compatibility, fabrication approval or wiring instruction. No unobserved customer-drawing geometry.
Shell / formNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
ManufacturerAmphenol RF (132134RP)S558Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact part role and termination fields only; not a cable-crimp or panel-mount substitute.
SeriesRP-SMA (132134RP)S558Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact part role and termination fields only; not a cable-crimp or panel-mount substitute.
Exact part / implementation132134RP (132134RP)S558Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Exact part role and termination fields only; not a cable-crimp or panel-mount substitute.
Recorded markingsNot recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keep this limit: A cross-reference entry is assessment material, not proof of exact product equivalence or safe mating. S559

Make the next check

Use exact part drawings for both ends; retain shell and center-contact descriptions together.

Existing source inspection and AI review remain distinct from independent technical review. A matching form does not establish a safe connection.

Recorded variant and source limits
  • RP-SMA must not be identified from shell gender alone; inspect the center contact.
  • System impedance, frequency range, cable and termination remain product-specific.
  • Prior view context (not a source-view value): Family-level coax interface context only; no mating-face dimensions or universal performance map is published.
Report a correction to this identification or view →

Bounded facts, visible unknowns

Specifications and limits

RP-SMA coaxial connector facts and limitations
Key distinctionCenter-contact arrangement differs from SMA [C064A]
Signal meaningRP identifies the connector variant, not inverted signal polarity [C064A]
Mechanical dimensionsNo independently reviewed mechanical drawing; fabrication dimensions unavailable.
Engineering pinoutSource-checked engineering profile available; independent review pending. Open engineering profile →
Verified device listNot included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.

No antenna modification, electrical performance approval or regulatory compliance determination is provided.

Before you connect

What to check

  1. Keep the RP prefix with the complete part number.
  2. Compare center pin versus socket using exact documentation.
  3. Check both ends of an adapter; do not assume it changes more than the named interface.
  4. Keep antenna and device approvals separate from physical identification.
Trace a supported connection class →

An ambiguity deliberately excluded

One manufacturer page uses reverse-threaded wording, while its SMA FAQ specifies the same threaded interface with reversed center-contact gender. This record follows the explicit FAQ and does not claim reverse-handed threads.

Your next step

Move from the form to the requirement.

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

Back to first citation ↑
C064ASource checked · pending review

RP-SMA changes the center-contact arrangement relative to ordinary SMA while retaining the same threaded interface. The RP prefix is not a claim that a signal is electrically inverted.

Amphenol RF · SMA Connectors ↗

Locator: Overview; FAQ: difference between SMA and RP-SMA
Access: public page. Threaded family and center-contact difference only. No universal frequency or torque rating.

S046: full source recordAmphenol RF · RP-SMA Connectors ↗

Locator: Overview and applications; read with SMA FAQ
Access: public page. Reverse-polarity family identification only. The page uses ambiguous reverse-threaded wording, which is not adopted.

S047: full source recordInspect review dependencies → (private workspace)

Claim scope: Named standard or manufacturer description only; procedural checks are editorial recommendations, not hardware tests.. Next review due 2026-12-30.

Back to first citation ↑
C064CSource checked · pending review

Amphenol RF identifies 132134RP as a straight 50-ohm RP-SMA jack with PCB through-hole termination and soldered contact termination.

Amphenol RF · Amphenol RF 132134RP — board-jack and thread fields ↗

Locator: Exact part heading; Product Specifications: Gender, Coupling, Thread Direction, Orientation, Termination Style and Contact Termination.
Access: public page. Source scope and revision retained. No manufacturing dimensions, current-revision equivalence, mating approval or hardware testing.

S558: full source recordInspect review dependencies → (private workspace)

Claim scope: Exact part role and termination fields only; not a cable-crimp or panel-mount substitute.. Next review due 2027-01-10.

Back to first citation ↑
C064DSource checked · pending review

The 132134RP specification page describes the coupling as threaded and the thread direction as Standard.

Amphenol RF · Amphenol RF 132134RP — board-jack and thread fields ↗

Locator: Exact part heading; Product Specifications: Gender, Coupling, Thread Direction, Orientation, Termination Style and Contact Termination.
Access: public page. Source scope and revision retained. No manufacturing dimensions, current-revision equivalence, mating approval or hardware testing.

S558: full source recordInspect review dependencies → (private workspace)

Claim scope: The RP designation is not used as proof of a reversed thread direction. Thread dimensions and a mating-part approval are not supplied.. Next review due 2027-01-10.

Back to first citation ↑
C064ESource checked · pending review

TE’s cross-reference guide describes the Amphenol 132134RP entry as a jack with a male center pin.

TE Connectivity · TE Connectivity Linx cross-reference — RP-SMA role labels and limits ↗

Locator: Printed page 5: the two Amphenol 132134RP rows; printed page 2: disclaimer. Both pages visually inspected.
Access: public pdf text. Source scope and revision retained. No manufacturing dimensions, current-revision equivalence, mating approval or hardware testing.

S559: full source recordInspect review dependencies → (private workspace)

Claim scope: The jack label and center-contact description are separate attributes. The exact Amphenol drawing remains uninspected; no shape or pin geometry is inferred.. Next review due 2027-01-10.

Back to first citation ↑
C064FSource checked · pending review

TE states that its cross-reference guide is for assessment and does not establish exact equivalence of competing products.

TE Connectivity · TE Connectivity Linx cross-reference — RP-SMA role labels and limits ↗

Locator: Printed page 5: the two Amphenol 132134RP rows; printed page 2: disclaimer. Both pages visually inspected.
Access: public pdf text. Source scope and revision retained. No manufacturing dimensions, current-revision equivalence, mating approval or hardware testing.

S559: full source recordInspect review dependencies → (private workspace)

Claim scope: A listed relationship is not a replacement, quality, specification or approval verdict; application-specific analysis remains necessary.. Next review due 2027-01-10.

Suggest a correction to this field note →

Put this field note to work.

Add to discovery trayRecord an unsaved candidate (private workspace)

Compare look-alikes: SMA versus RP-SMA

Candidate selection does not confirm the identity or capabilities of your physical item.

Use this reference

From identity to the right next question

NAMED-PART REFERENCE / SHELL, CONTACT & MOUNT

Separate the interface from its termination.

Read the exact shell role and centre-contact description separately. A side study does not expose or certify the assembled mating contact.

Amphenol RF 132113RP-10

Component role
Plug
Termination
Cable crimp
Centre-contact scope
Campbell Scientific standard/RP vocabulary, not visible contact geometry in the named side study.
Inspect the declared view → (private workspace)

Read both exact interface designations and the equipment requirements. The body profile does not settle the center-contact type.

Evidence, date & limits

new named-product text plus explicitly scoped vocabulary. Observation date: . Campbell Scientific standard/RP vocabulary, not visible contact geometry in the named side study.

132113RP-10 — RP-SMA straight crimp plug ↗
Product Specifications: Gender Plug, Termination Style Cable - Crimp, Thread Direction Standard.

132113RP-10 customer outline drawing ↗
PDF page 1; printed Sheet 1 of 1, revision A, 24-Mar-2011. Body profile beside separate contact and ferrule. Page rendered rotated; orientation normalized for original study.

Understanding the Ins and Outs of RF Connectors ↗
Four explanatory bullets for standard plug, standard jack, reverse-polarity plug and reverse-polarity jack; dated 30 March 2016.

Not established: Opposite exact connector, equipment identity, cable construction, radio/antenna suitability and complete-path performance.

Next check: Read both exact interface designations and the equipment requirements. The body profile does not settle the center-contact type.

No hardware test or independent technical approval. The two MCX/MMCX observations retain their V126 inspection history; the new rows do not refresh those sources.

Amphenol RF 132134RP

Component role
Jack
Termination
PCB through-hole
Centre-contact scope
Campbell Scientific standard/RP vocabulary, not visible contact geometry in the named side study.

Exact physical view unavailable. No substitute image selected.

Read both exact interface designations and the equipment requirements. The body profile does not settle the center-contact type.

Evidence, date & limits

new named-product text plus explicitly scoped vocabulary. Observation date: . Campbell Scientific standard/RP vocabulary, not visible contact geometry in the named side study.

132134RP — RP-SMA PCB through-hole jack ↗
Product Specifications: Gender Jack, Termination Style PCB - Through Hole, Thread Direction Standard; Customer Drawing link.

Understanding the Ins and Outs of RF Connectors ↗
Four explanatory bullets for standard plug, standard jack, reverse-polarity plug and reverse-polarity jack; dated 30 March 2016.

Not established: Opposite exact connector, equipment identity, cable construction, radio/antenna suitability and complete-path performance.

Next check: Read both exact interface designations and the equipment requirements. The body profile does not settle the center-contact type.

No hardware test or independent technical approval. The two MCX/MMCX observations retain their V126 inspection history; the new rows do not refresh those sources.

Read all six source-qualified examples and printable guide →

REVISION-QUALIFIED RF REFERENCE

Keep source identity beside the component.

132134RP / exact product-page identity

Role
Jack with board through-hole termination; straight orientation.
Distinction
Threaded coupling, Standard thread direction; soldered contact.
Established
These are separate manufacturer fields, not a visual mating decision.
Not established
Exact physical drawing and current geometry remain uninspected.
Next check
Retain the full RP part number and obtain its exact drawing; do not use 132134 as a substitute.

No physical view is assigned to this evidence row.

Evidence, revision & limits

Observed . C064C · C064D

Amphenol RF 132134RP — board-jack and thread fields ↗
Exact part heading; Product Specifications: Gender, Coupling, Thread Direction, Orientation, Termination Style and Contact Termination.
S558 · canonical observation date 2026-10-12. Part-specific jack role, standard thread direction and PCB through-hole solder termination. Linked drawing could not be visually inspected; no physical geometry is inferred.

Observation date is not drawing issue date. No hardware test, current-revision equivalence or independent approval.

132134RP / TE competitor-description rows

Role
The TE rows pair the jack label with a male center pin.
Distinction
Center-contact form is separate from the jack designation.
Established
The source supplies terminology, not an equivalence approval.
Not established
No TE replacement, unseen geometry or application compatibility is established.
Next check
Read the guide disclaimer and verify exact part-specific requirements independently.

No physical view is assigned to this evidence row.

Evidence, revision & limits

Observed . C064E · C064F

TE Connectivity Linx cross-reference — RP-SMA role labels and limits ↗
Printed page 5: the two Amphenol 132134RP rows; printed page 2: disclaimer. Both pages visually inspected.
S559 · canonical observation date 2026-10-12. The competitor-description rows identify a jack with a male pin. TE explicitly does not assert exact equivalence; this guide is not a replacement approval or a source for uninspected geometry.

Observation date is not drawing issue date. No hardware test, current-revision equivalence or independent approval.

Read the illustrated revision and contact reference →

Evidence behind this page

Scope first. Source second. Approval separate.

4 linked sources · 5 scoped claims · 0 sources with inspection/access flags.

Page scope: consumer_pilot

Assessment 2026-10-22 · earliest scheduled source review 2026-12-30. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 4 source scopes, access limits and dates

S046 · SMA Connectors

Amphenol RF · Manufacturer / product-owner domain · inspected 2026-10-01 · due 2026-12-30

Within inspection window

Scoped support: Threaded family and center-contact difference only. No universal frequency or torque rating.

Not established / limitations: Threaded family and center-contact difference only. No universal frequency or torque rating.

Locator: Overview; FAQ: difference between SMA and RP-SMA

S047 · RP-SMA Connectors

Amphenol RF · Manufacturer / product-owner domain · inspected 2026-10-01 · due 2026-12-30

Within inspection window

Scoped support: Reverse-polarity family identification only. The page uses ambiguous reverse-threaded wording, which is not adopted.

Not established / limitations: Reverse-polarity family identification only. The page uses ambiguous reverse-threaded wording, which is not adopted.

Locator: Overview and applications; read with SMA FAQ

S558 · Amphenol RF 132134RP — board-jack and thread fields

Amphenol RF · Manufacturer / product-owner domain · inspected 2026-10-12 · due 2027-01-10

Within inspection window

Scoped support: Part-specific jack role, standard thread direction and PCB through-hole solder termination. Linked drawing could not be visually inspected; no physical geometry is inferred.

Not established / limitations: Source scope and revision retained. No manufacturing dimensions, current-revision equivalence, mating approval or hardware testing.

Locator: Exact part heading; Product Specifications: Gender, Coupling, Thread Direction, Orientation, Termination Style and Contact Termination.

S559 · TE Connectivity Linx cross-reference — RP-SMA role labels and limits

TE Connectivity · Manufacturer / product-owner domain · inspected 2026-10-12 · due 2027-01-10

Within inspection window

Scoped support: The competitor-description rows identify a jack with a male pin. TE explicitly does not assert exact equivalence; this guide is not a replacement approval or a source for uninspected geometry.

Not established / limitations: Source scope and revision retained. No manufacturing dimensions, current-revision equivalence, mating approval or hardware testing.

Locator: Printed page 5: the two Amphenol 132134RP rows; printed page 2: disclaimer. Both pages visually inspected.

Trace 5 claims to their source records

C064A · P064

RP-SMA changes the center-contact arrangement relative to ordinary SMA while retaining the same threaded interface. The RP prefix is not a claim that a signal is electrically inverted.

Claim scope: Named standard or manufacturer description only; procedural checks are editorial recommendations, not hardware tests.

Source links: S046 · S047 · Evidence trail → (private workspace)

C064C · P064

Amphenol RF identifies 132134RP as a straight 50-ohm RP-SMA jack with PCB through-hole termination and soldered contact termination.

Claim scope: Exact part role and termination fields only; not a cable-crimp or panel-mount substitute.

Source links: S558 · Evidence trail → (private workspace)

C064D · P064

The 132134RP specification page describes the coupling as threaded and the thread direction as Standard.

Claim scope: The RP designation is not used as proof of a reversed thread direction. Thread dimensions and a mating-part approval are not supplied.

Source links: S558 · Evidence trail → (private workspace)

C064E · P064

TE’s cross-reference guide describes the Amphenol 132134RP entry as a jack with a male center pin.

Claim scope: The jack label and center-contact description are separate attributes. The exact Amphenol drawing remains uninspected; no shape or pin geometry is inferred.

Source links: S559 · Evidence trail → (private workspace)

C064F · P064

TE states that its cross-reference guide is for assessment and does not establish exact equivalence of competing products.

Claim scope: A listed relationship is not a replacement, quality, specification or approval verdict; application-specific analysis remains necessary.

Source links: S559 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.