Design Memory Platform

FWAL - Falling Water Architectural Language

v0.009 · 2026-07-17 · conforms to GALF v0.008

Capture the architectural language of Fallingwater as a study of composition, site responsiveness, spatial sequence and design intent. Describe how architecture can respond to landscape, water, rock, material, view, movement and experience. Enable architectural reasoning rather than imitation.

18 of 18 sections carry content. Required: 11 of 11. The rest state unknown, which is the point: an empty section is an answer, silence is not.

■ REQUIRED (11)   ■ RECOMMENDED (6)   ■ OPTIONAL (1)

solid + bold = PRESENT (18)    dashed = UNKNOWN (0)

s1 Mission s2 Requirements s3 Identity s4 Terminology s5 Hierarchy s6 Relationships s7 Parameters s8 Operations s9 Rules s10 Constraints s11 Evidence s12 Status s13 Validation s14 Memory s15 History s16 Implementation s17 Resolution Axis s18 Knowledge Status

Mission

REQUIRED · PRESENT

Capture the architectural language of Fallingwater as a study of composition, site responsiveness, spatial sequence and design intent.
Describe how architecture can respond to landscape, water, rock, material, view, movement and experience.
Enable architectural reasoning rather than imitation.

Requirements

REQUIRED · PRESENT

Must describe architectural composition.
Must describe site responsiveness.
Must describe spatial sequence and experiential relationships.
Must support material and landscape relationships.
Must distinguish known, assumed, inferred, unknown, deprecated and future knowledge.
Must remain implementation-independent.
Must not generate copies of Fallingwater; it must capture the language behind the design.

Identity

REQUIRED · PRESENT

item	detail
full name	Falling Water Architectural Language
language	FWAL
file status	DRAFT - ringfenced under D144, not adopted into the bundle
conformance note	Conformance pass by the Specification Owner (GALF steward), 09 Jul 2026, from FWAL v0.001 (Miles Walker, concept file).
platform terms note	FWAL references no GAAD platform terms. Its vocabulary is wholly language-owned; zero overlap with gaad_terminology.json confirmed at this pass.

platform terms referenced

identity

item	detail
name	FWAL
full name	Falling Water Architectural Language
type	Architectural Language
framework	GALF
conforms to	GALF v0.005
knowledge status	seed
platform status	unintegrated
role	Architectural composition and site-responsive design language
reference case	Fallingwater
resolution axis	Site Response (FWAL's interpretation of the experimental GALF concept, see GALF 9)
key distinction	FWAL is not Fallingwater. FWAL is the language that helps explain why Fallingwater feels like Fallingwater.

readiness level

item	detail
code	T3
rung	Language agreed

Terminology

REQUIRED · PRESENT

terminology

Site
Landscape
Rock
Water
Waterfall
Stream
Forest
Building
Composition
Core
Hearth
Terrace
Cantilever
Horizontal Plane
Vertical Plane
Threshold
Approach
Arrival
Space
Room
View
Prospect
Refuge
Compression
Release
Light
Shadow
Material
Stone
Concrete
Steel
Glass
Sound
Movement
Sequence
Axis
Proportion
Balance
Spatial Sequence
Material Language
Depth
Experience
Place

x object template

Identity
Purpose
Parent
Children
Relationships
Rules
Default Dimensions
Variable Dimensions
Materials
Constraints
Validation
Notes
Source Reference

Was terminology and the object template.

Hierarchy

REQUIRED · PRESENT

hierarchy text

Site
Landscape
Water
Rock
Forest
Building
Composition
Core
Terrace
Cantilever
Horizontal Plane
Vertical Plane
Spatial Sequence
Approach
Arrival
Threshold
Space
Room
View
Material Language
Stone
Concrete
Steel
Glass

x object hierarchy

Site
Landscape
Forest
Rock Ledge
Bear Run
Waterfall
Sound Field
Approach
Building Group
Main House
Geological Anchor
Stone Core / Chimney
Structural System
Bolster / Pier
Main Cantilever Beam
Joist
Parapet Edge Beam
Slab / Tray
Structural Mullion
Reinforcement
Post-tensioning Intervention
Level
River Level
Ground Floor
Second Floor
Third Floor
Space
Terrace
Threshold
View
Material Layer
Guest House
Connecting Canopy

Was hierarchy_text and x_object_hierarchy.

Relationships

REQUIRED · PRESENT

relationships

source	type	target	why
Building	belongs_to	Site	The building is understood through its site rather than as an isolated object.
Building	responds_to	Landscape	The design language depends on landscape response.
Building	grows_from	Rock	The building should appear anchored to its geological setting.
Terrace	projects_over	Water	Horizontal planes extend occupation over the landscape and water.
Core	anchors	Composition	Vertical mass holds the horizontal planes in balance.
Hearth	anchors	Space	The hearth is the fixed centre the rooms gather around.
Spatial Sequence	reveals	View	Movement discloses the landscape progressively, never all at once.
Threshold	transitions	Space	Compression at thresholds sets up release into open space.
Composition	frames	View	Openings and planes select and frame what is seen.
Material	reinforces	Place	Local stone and honest material use tie the building to its place.
Sequence	defines	Experience	Experience is the ordered product of approach, arrival, compression and release.

relationship types declared

aligns_with
anchors
approaches
arrives_at
balances
cantilevers_from
centres_on
compresses
connects_to
contrasts_with
expresses
extends_to
extends_view
focuses_on
follows_contours
frames
grounds
grows_from
interlocks_with
moves_through
opens_to
pauses_at
projects_over
reinforces
releases
responds_to
returns_to
reveals
supports
transitions

x relationship categories

item	detail
note	Six relationship families from ChatGPT's research; all types declared above so triples stay GALF s3.6 conformant.

Site

belongs_to
responds_to
grows_from
projects_over
aligns_with
follows_contours

Structural

anchors
supports
balances
cantilevers_from
interlocks_with

Spatial

connects_to
reveals
transitions
compresses
releases
centres_on

Visual

frames
opens_to
extends_view
focuses_on

Material

reinforces
grounds
contrasts_with
expresses

Experiential

approaches
arrives_at
moves_through
pauses_at
returns_to

x relationship schema

item	detail
credit	ChatGPT (Architecture Reviewer, D140).

fields

source_object
relationship_type
target_object
description
strength
evidence
status
validation_rule

FWAL's rows carry FOUR elements: source, type, target, and a RATIONALE saying why the relation holds - the only s6 in the estate that explains itself. The contract describes a three-element triple, so this is either non-conformant or the contract is too thin: A0011, open, Miles's word. Carried verbatim. FWAL declares 30 types; the only two it uses without declaring, belongs_to and defines, are base types under v0.008 and need none.

Parameters

REQUIRED · PRESENT

parameters

item	detail
Storeys	2 to 4 (low rise)
Cantilever Depth	variable, landscape-driven
Terrace Ratio	high (horizontal planes dominate)
Glazing Ratio	medium to high
Structural Expression	exposed
Material Palette	restricted, natural
Primary Axis	landscape-driven
Colour	subdued (light ochre, Cherokee red at Fallingwater)

Site

topography
water
rock
vegetation
orientation
approach
sound

Landscape

density
seasonality
views
enclosure
movement

Building

position
orientation
relationship_to_water
relationship_to_rock

Terrace

projection
level
orientation
view
relationship_to_water

Cantilever

projection
balance
support_condition
visual_weight

Core

position
mass
verticality
material

Space

compression
release
prospect
refuge
view
light

Material

texture
weight
colour
locality
contrast
harmony

x parameter schema

item	detail
credit	Schema and values contributed by ChatGPT (Architecture Reviewer, D140).

note

Every FWAL parameter records these fields. Status vocab per GALF s3.4 extended for research: Known/Approximate/Assumed/Variable/Unknown. 'verification' is a FWAL honesty field: who/what confirmed the value.

fields

purpose
data_type
units
default
minimum
maximum
status
verification
evidence
notes

x verified dimensions

item	detail
verified by	web_search_2026_07_11 (fallingwater.org / Wikipedia / Britannica)

note

Verified and derived figures from authoritative sources (fallingwater.org, Silman/Scientific American, HABS). Source terminology preserved: official areas are gross 'uses', not surveyed net internal area.

item	value	units	status
main_house_total_area_m2	864.0	m2	Derived (9,300 sq ft official)
main_house_terrace_area_m2	408.77	m2	Derived (4,400 sq ft official)
main_house_non_terrace_area_m2	455.22	m2	Derived difference - NOT net internal area
terrace_to_total_ratio	0.4731	ratio	Derived
guest_house_total_area_m2	463.59	m2	Derived (4,990 sq ft official)
guest_house_terrace_area_m2	181.16	m2	Derived (1,950 sq ft official)
rise_above_falls_m	>9.14	m	Approximate lower bound ('more than 30 ft')
upper_terrace_extra_south_projection_m	1.83	m	Verified (Silman)
primary_cantilever_projection_m	4.57	m	Approximate (~15 ft, pending HABS)
flagstone_thickness_m	0.05	m	Approximate (official ~2 in)
stone_ledge_projection_m	0.08-0.10	m	Approximate (official 3-4 in)
terrace_deflection_1955_m	0.1	m	Approximate (official ~4 in)
max_recorded_deflection_m	0.18	m	Approximate (official ~7 in)
plate_glass_thickness_mm	6	mm	Verified/converted (official 1/4 in = 6 mm)
formwork_removal_movement_mm	45	mm	Verified (Silman, ~44.5 mm; 45 mm to whole mm)

x level model

item	detail
verified by	web_search_2026_07_11 (fallingwater.org / Wikipedia / Britannica)
River Level	stream stair, hatch/doors, direct access to Bear Run - not a conventional full storey
Ground Floor	entrance, foyer, living/dining, kitchen, hearth, main terraces
Second Floor	master bedroom + private rooms, terraces, gallery/circulation
Third Floor	Edgar Kaufmann Jr. accommodation/study, upper terrace/roof
Guest House	separate uphill building linked by cascading concrete canopy - a related Building, NOT a level of the main house
mezzanine	Unknown / not supported - do not create a Mezzanine object without measured-drawing evidence

note

Four named levels (Columbia floor-plan study, official descriptions). Level is the primary vertical term; storey is a reporting attribute only - River Level shows why an integer storey count loses knowledge. No verified mezzanine.

x structural system

item	detail
verified by	web_search_2026_07_11 (fallingwater.org / Wikipedia / Britannica)
hierarchy	Bedrock/ledge -> foundations/bolsters/piers/stone masses -> four principal first-floor cantilever beams -> joists -> edge beams within parapets (flat soffits) -> slabs/trays
steel mullions	four T-shaped steel window mullions at the south edge of the living room help support the terrace above
known defect	original reinforcement insufficient for negative bending; cracking and progressive deflection followed
intervention 2002	post-tensioned three of the four major living-room beams; monitored movement ~1/100 in over the following decade
reinforcement history	Pittsburgh supplier recommended doubling the 1-inch-square bars per main beam from 8 to 16, installed over Wright's objection; still insufficient for negative reinforcement

note

Hybrid: locally quarried Pottsville sandstone walls/chimney/bolsters/piers rise from and connect to bedrock; reinforced-concrete beams/joists/slabs/parapets/trays project from the anchored zone; steel reinforcement resists tension; steel mullions participate structurally.

design memory states

Design Intent
Constructed Condition
Observed Performance
Intervention
Current Monitoring

x materials

item	detail
Pottsville sandstone	walls/chimney, locally quarried, rough projecting courses imitate Bear Run ledges - grounds, anchors, echoes
Reinforced concrete	cantilever trays, beams, joists, parapets, roofs, trellises - projects, spans, layers
Flagstone	interior/exterior floors, terraces, stairs, ~0.05 m thick - continues, blurs boundary
Polished plate glass	windows, terrace doors, skylights, hatch doors, ~0.006 m - frames, reveals, protects
Steel	reinforcement, Cherokee-red frames, structural mullions, post-tensioning - resists, supports, contrasts
Redwood	terrace subfloor/spanning construction - supports finish, concealed layer
verified by	web_search_2026_07_11 (fallingwater.org / Wikipedia / Britannica)

Was parameters, the parameter schema, verified dimensions, the level model, structure and materials.

Operations

RECOMMENDED · PRESENT

Respond to Site
Anchor Core
Project Terrace
Frame View
Compress Space
Release Space
Sequence Movement
Balance Mass
Reveal Landscape
Layer Horizontal Planes
Contrast Vertical Core
Reinforce Material Identity

Rules

REQUIRED · PRESENT

The building should be understood through its site, not as an isolated object.
Horizontal planes should contribute to the dominant compositional language.
Vertical mass should anchor the composition.
Terraces extend occupied space into landscape.
Material choices should reinforce place and character.
Views are framed through spatial sequence.
Movement should reveal architecture progressively.
Landscape is part of the architectural composition.
Water, rock and forest are not background; they are active language terms.
FWAL must support architectural reasoning, not imitation.
Fireplace shall originate from existing natural rock.
No unnecessary symmetry - composition follows site, not axis.

s10

Constraints

RECOMMENDED · PRESENT

Do not copy Fallingwater as a style object.
Do not reduce the language to geometry alone.
Do not treat site as background.
Do not invent unknown evidence.
Do not lock the language to any implementation environment.
Maintain distinction between known, inferred and interpretive knowledge.

s11

Evidence

RECOMMENDED · PRESENT

evidence

Evidence should be linked to drawings, photographs, site studies, published analysis, design commentary and project research where available.
Current evidence status = seed language based on architectural reasoning from discussion.
Formal evidence collection remains future work.
Reference-case geo, elevation, architect, client and dates verified by web search 11 Jul 2026 (Britannica, Wikipedia, latlong.net).
Parameter figures (building, terrace, structural, spatial) are published values NOT verified by Claude against measured drawings - each row carries a verification flag; see x_*_parameters.
Source priority for future verification (x_research_method): Fallingwater measured drawings, HABS survey, FLW original drawings, published books, structural studies, site photography, contemporary surveys.
Every captured item is to carry its own source reference (provenance rule).
Compression/release ceiling heights and beam dimensions are approximate; precision artefacts noted where a metric value is an exact imperial conversion (e.g. beam centres 1.219 m = 4 ft).
Building organisation, three principal occupied levels, overall height, principal ceiling heights, structural concept, cantilever lengths, floor areas and terrace hierarchy are research-supported (ChatGPT, 11 Jul 2026) - published, not verified against measured drawings.
Study reference (NOT primary evidence for dimensions): Sketchfab model of Fallingwater - suitable for composition, terrace hierarchy, roof geometry, circulation, object identification only.
Further research required: finished floor levels, floor-to-floor dimensions, structural grid, wall thicknesses, stair geometry, window/door dimensions, roof and terrace slab thickness, primary structural datum, survey control points.

x correction register

item	subject	was	now	reason
1	Visitor address	1419 Mill Run Road	1491 Mill Run Road, Mill Run, PA 15464	verified current gate-entry address; my earlier 1419 rejected
2	Coordinates		39.900881, -79.465613	verified visitor-gate GPS (not house centroid); supersedes the earlier 39.906113,-79.468056 which was an approximate locator
3	Main-house area	268 + 227 m2 (my v0.004 x_building_parameters)	864.00 m2 total; 408.77 m2 terraces; 455.22 m2 non-terrace	derived from official 9,300 sq ft total and 4,400 sq ft terraces; earlier split not retained as whole-house totals
4	Level count	three storeys	River + Ground + Second + Third (four named levels)	Columbia floor-plan set; 'three storeys' alone loses River Level
5	Overall height	9.000 m exact	>9.14 m above the falls	official 'more than 30 ft'; 9.00 m not exact

reference case

item	detail
name	Fallingwater
note	The building's proper name is one word (Fallingwater); the language name expands as two words (Falling Water) by Miles's choice.
architect	Frank Lloyd Wright
client	Edgar J. Kaufmann Sr.
designed	1935
completed	1937
address	1491 Mill Run Road, Mill Run, Stewart Township, Fayette County, Pennsylvania 15464, United States
watercourse	Bear Run, a tributary of the Youghiogheny River
recognition	UNESCO World Heritage (2019, 20th-Century Architecture of Frank Lloyd Wright); US National Historic Landmark (1966)
sources verified	Britannica, Wikipedia, MoMA, Fallingwater.org (11 Jul 2026)
zip	15464
guest house service wing completed	1939
owner	Western Pennsylvania Conservancy (since 1963)
main house construction	1936-1938 (Verified)
guest house construction	1939 (Verified)
designations	National Register 1974; National Historic Landmark 1976; UNESCO 2019 (component 1496-005)
landscape	Bear Run Nature Reserve; official facts page states 5,100 acres
orientation	30 degrees counterclockwise from due south (Verified, Wikipedia) - so every room receives natural light

address correction note

Corrected from 1419 to 1491 on 11 Jul 2026 - re-verified against fallingwater.org and Western Pennsylvania Conservancy. The earlier 1419 was a Claude transcription error; ChatGPT's research had it right.

geo

item	detail
lat	39.906113
lon	-79.468056
datum	WGS84
site elevation m	396
site elevation ft	1298

gate coordinates

item	detail
lat	39.900881
lon	-79.465613
status	Verified (visitor gate, not house centroid)

x evidence vocabulary

item	detail
Verified	directly supported by an authoritative or primary source
Derived	calculated from a verified imperial value or verified components
Supported interpretation	architectural reading strongly supported by several sources, not a measured fact
Approximate	source uses 'more than', 'about' or a rounded value
Unverified	previously stated, not supported by sources reviewed
Unknown	no reliable value established this pass
Extractable	obtainable from authoritative HABS measured drawings, not yet transcribed

x measured drawings

item	detail
habs main house sheets	11
habs guest house sheets	4
source	loc.gov/pictures/item/pa1690 (HABS PA-5346): first floor plan sheet 4, elevations sheet 8, sections sheet 10

note

Library of Congress HABS PA-5346 changes the research position: 11 measured main-house sheets + 4 guest-house sheets openly available. Items previously 'unknown' are now 'Extractable from authoritative measured drawings' until transcribed.

extractable when transcribed

finished-floor elevations
floor-to-floor dimensions
overall plan dimensions
room dimensions/areas
beam sections/centres/reinforcement
stone wall thicknesses
slab/parapet/roof thicknesses
door/window/mullion schedules
stair geometry
site contours/waterfall datum/building-to-water offsets
house-centroid coordinates

x research method

item	detail
note	Reverse-engineering: discover the language that produced the work, not the work. Captured in dependency order.
principle	Relationships before coordinates. Dimensions support the language, they do not define it.
provenance rule	Every captured item carries its source reference.
credit	Research approach contributed by ChatGPT (Architecture Reviewer, D140).

layers

Philosophy
Site
Primary Objects
Object Relationships
Rules
Dimensions

sources priority

Fallingwater measured drawings
Historic HABS survey
Frank Lloyd Wright original drawings
Published books
Structural studies
Site photography
Contemporary surveys

Was evidence, reference case, evidence vocabulary, correction register, measured drawings and research method.

s12

Status

REQUIRED · PRESENT

item	detail
Site relationship	known
Cantilevered terraces	known
Hearth as anchor	known
Material palette (stone, concrete, steel, glass)	known
Compression and release sequence	inferred
Prospect and refuge reading	inferred
Compositional rules as stated	assumed
Resolution Axis (Site Response)	assumed
Formal evidence base	future
Platform integration	future

s13

Validation

REQUIRED · PRESENT

validation

Check that every relationship uses valid FWAL terminology.
Check that every relationship triple uses a base-vocabulary or declared relationship type (GALF 3.6).
Check that site, landscape and building relationships remain explicit.
Check that composition is not reduced to object naming.
Check that evidence status is recorded for interpretive claims.
Check that the language supports reasoning rather than copying.
Platform integration (when platform_status advances): ship proving steps into Validate Scripts via the shared assertion library (GALF 8, layer 3).

x fidelity scorecard

note

Architectural-recognition scoring, not geometric duplication. Each category scored; the aggregate is Architectural Fidelity, the selection signal for evolution. Experimental (x_) pending promotion into GALF Validation.

Memory

REQUIRED · PRESENT

FWAL emerged as the acid test for GALF because it tests architectural composition and site responsiveness.
FWAL demonstrated that GALF can support experiential and philosophical architectural knowledge, not only construction or urban hierarchy.
FWAL helped reveal that Architectural Languages can capture ways architects think, not just types of buildings.
When platform-active, stage files record language = FWAL, language_version, galf_version (GALF 7).
FWAL preserves architectural REASONING, not geometry: why a form belongs to the Fallingwater family, kept as replayable design memory.
The pruned-branch principle (GAAD founding rule 'decisions become data') applies: rejected design variants are retained with the rule or fidelity score that rejected them.
The fidelity scorecard (x_fidelity_scorecard) is the memory of 'recognisable' - the nine-category signal a mutation loop selects on.
Rule provenance is memory: each rule should eventually carry status, evidence and source (Evidence s11) so a future reader knows why it holds.

s15

History

RECOMMENDED · PRESENT

item	detail
note	Newest first. Each entry is the change that produced that version.

v0.009 17 Jul 2026

v0.009 (17 Jul 2026): the file takes the GALF spine - all 18 sections present by code, each carrying content or stating unknown (D186, Miles's word). Nothing invented, nothing lost: content moved to the section that owns it, anything needing a ruling carried whole under 'unshelved'. conforms_to corrected to GALF v0.008, the contract that requires this spine and carries the base relationship vocabulary. Previously GALF v0.005.

v0.008 11 Jul 2026

v0.008 (11 Jul 2026): folded ChatGPT's Verified Research Revision v0.002. Spot-verified by Claude against fallingwater.org/Wikipedia/Britannica: 9,300 sq ft main + 4,400 terraces, guest 4,990/1,950, 1936-38 build, >30 ft rise, 30-deg orientation, four named levels, structural/deflection history - all confirmed. CORRECTIONS: coordinates -> verified gate 39.900881,-79.465613; areas -> 864/408.77/455.22 m2 (my earlier 268+227 not retained); level count -> four named levels; height -> >9.14 m not 9.00 exact. Added x_verified_dimensions, x_level_model (four levels), x_structural_system (with design-memory time states), x_materials, x_object_hierarchy, x_measured_drawings (HABS: unknown -> extractable), x_evidence_vocabulary, x_correction_register. Retired the superseded unverified parameter keys. GALF untouched.

v0.007 11 Jul 2026

v0.007 (11 Jul 2026): no content removed. Miles's ruling applied - unverified research is ACCEPTED as usable working knowledge, every unverified value restamped verification=usable_unverified (verify later, not 2026), each research block given a provenance banner, and an x_knowledge_policy note added so the verified/usable-unverified split is explicit to any reader. GALF untouched.

v0.006 11 Jul 2026

v0.006 (11 Jul 2026): folded ChatGPT's Building-Levels/Structure/Geo research. CORRECTED reference-case address 1419 -> 1491 Mill Run Road (my earlier transcription error; re-verified fallingwater.org + WPC; ChatGPT was right). Added x_level_model (three levels, no mezzanine), x_structural_system (hierarchy, objects, typed relationships), x_vertical_parameters (FFLs Unknown, kept honest). Evidence expanded with the research-supported vs further-research-required split and the Sketchfab study-only caveat. GALF untouched.

v0.005 11 Jul 2026

v0.005 (11 Jul 2026): aligned to GALF v0.005 canonical 17-section order; three thin sections populated honestly - Evidence (verification ladder + verified/unverified split), Memory (what FWAL preserves: reasoning, pruned branches, fidelity, rule provenance), Implementation (no prototype yet; Connector-run when built). No values invented; unverified figures still flagged. GALF untouched.

v0.004 11 Jul 2026

v0.004 (11 Jul 2026): measurable parameters folded from ChatGPT's Parameters & Relationships research (Architecture Reviewer). Parameter schema, site/building/terrace/structural/spatial parameter tables and six relationship categories imported as x_ keys. HONEST STATUS: only site elevation and lat/long carry verification=web_search_2026_07_11 (verified today); every other figure is marked verification=unverified_published - a published value not checked against measured drawings, precision as-supplied. Unknowns kept Unknown. Nothing promoted into GALF; all additions x_ namespaced pending seat review.

v0.003 11 Jul 2026

v0.003 (11 Jul 2026): full_name set to Falling Water Architectural Language; conforms_to lifted to GALF v0.005; reference_case provenance added (architect, client, address, WGS84 geo, dates - verified by search); parameter dials folded from Miles's draft; two rules added (rock-origin fireplace, no unnecessary symmetry); x_fidelity_scorecard, x_research_method and x_object_template folded from ChatGPT's research spec. Vocabulary, typed relationships and phenomenology retained from v0.002 unchanged.

v0.002 11 Jul 2026

Identity carries the two status axes and conforms_to (GALF 5.2): knowledge_status = seed, platform_status = unintegrated (v0.001 said not_active - normalised to the GALF registry vocabulary).
Terminology linkage (GALF 3.3): platform_terms_referenced declared explicitly - FWAL references NO GAAD platform terms (checked against gaad_terminology.json, zero overlap).
Internal coherence (GALF 3.6): five terms used in Hierarchy/Relationships but absent from Terminology now declared: Spatial Sequence, Material Language, Depth, Experience, Place.
Eight additional relationship types declared (GALF 3.6): anchors, frames, grows_from, projects_over, reinforces, responds_to, reveals, transitions. belongs_to and defines are base vocabulary.
Resolution Axis declared - absent from v0.001, and FWAL is the acid test for it (GALF 9): FWAL interpretation = Site Response, the ordered ladder Site -> Composition -> Sequence -> Space -> Material Detail. Status = assumed.
Per-concept Status added using the mandatory vocabulary (GALF 3.4); the v0.001 prose status lines are retired.

origin

Origin = GAAD / GALF discussion exploring whether GALF could support a third axis beyond GRAL and MHAL.
Key insight = FWAL is not Fallingwater; FWAL is the language that helps explain why Fallingwater feels like Fallingwater.
v0.001 = first shareable seed file (Miles Walker).
v0.002 = conformance pass to GALF v0.004 by the Specification Owner: status axes structured, terminology linkage declared, coherence fixed, relationship types declared, Resolution Axis declared and the acid test answered.
v0.003 = Falling Water naming + reference-case provenance + parameter dials (Miles) + fidelity/method/template (ChatGPT), folded onto the v0.002 conformant base.

Was history plus seven changes_from_* keys, newest first.

s16

Implementation

OPTIONAL · PRESENT

Implementation-independent.
May later be interpreted by GAAD tools, reports, visualisers or validators.
No software environment is part of the language definition.
No FWAL prototype exists yet - the language is a seed; generation is future work.
When built, FWAL runs through the GAAD Language Connector like any language (eight verbs) - it names no engine (GALF s10).
First implementation target: a fidelity-scored generator per x_research_method, validated by architectural recognition against the Fallingwater reference case, not geometric duplication.

s17

Resolution Axis

RECOMMENDED · PRESENT

item	detail
galf concept	Resolution Axis (EXPERIMENTAL, GALF 9)
fwal interpretation	Site Response
reading	Increasing resolution moves design knowledge from the landscape relationship inward to material detail - the same generic concept GRAL expresses as Stage Depth and MHAL expresses as Scale.
status	assumed

acid test verdict

The Resolution Axis concept survives FWAL unchanged, provided the concept is read as an ordered ladder along which design knowledge resolves - not as a construction-detail ladder. Freeze at GALF v0.005 is a three-seat decision.

ladder

Site
Composition
Sequence
Space
Material Detail

s18

Knowledge Status

RECOMMENDED · PRESENT

FWAL accepts usable working knowledge that advances the language, clearly flagged where unverified. Verified facts (reference-case geo, address, architect, dates) carry verification=web_search_2026_07_11. Research-derived content (levels, structure, dimensions) carries verification=usable_unverified and is to be confirmed against measured drawings at a later date, not in 2026. Decision by Miles Walker (Chief Architect), 11 Jul 2026.