{ "openapi": "3.1.1", "info": { "title": "Procedural Material Graph (PBR) API", "version": "1.0.0", "summary": "Evaluate a seamless procedural material graph and preview it on a sphere.", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://renderloommaterialgraph.usefulweb.app" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Evaluate a seamless procedural material graph and preview it on a sphere.", "description": "Run a Renderloom Material Nodes graph — noise, Voronoi, bricks, gradients, blends, domain warp, levels, curves and surface-from-height nodes — and get base color, normal, roughness, metallic, ambient occlusion and height maps, a lit sphere and a tiled plane preview, a per-node report and the editable graph. Start from brick, wood, stone, metal or fabric.\n\nMethodology:\n- Every generator is periodic over the tile: Perlin and value noise wrap their integer lattice indices, simplex noise is sampled on a 4-D torus, Voronoi cells wrap their cell indices, and bricks, waves, ramps and checkers repeat a whole number of times. Warp, blur, normal, occlusion and curvature sample with wrap-around, so every map tiles seamlessly.\n- Perlin noise uses Ken Perlin’s 2002 Improved Noise with his reference permutation for seed 0 (noise(3.14, 42, 7) = 0.13691995878400012). Other seeds shuffle the permutation deterministically. Octaves double the frequency, so periods stay whole numbers.\n- Blend modes are the W3C separable formulas shared with the Lumina compositor, on display (sRGB-encoded) values. Curves are monotone Fritsch–Carlson splines. Gray inputs feed color ports as equal RGB; color feeds gray ports through Rec. 709 luma weights.\n- Normals use wrapped central differences with the height range expressed as a fraction of the tile width (resolution independent, +Y up). Ambient occlusion is horizon based: 1 − strength × mean over 8 directions of the sine of the highest horizon within the radius. Curvature is 0.5 − strength × (ring mean − centre) × depth / radius.\n- Previews use the glTF 2.0 metallic-roughness BRDF (GGX, separable Smith-GGX visibility, Schlick Fresnel) with one directional light and a dim ambient term. The continuity check compares the steps across the wrap edges with the steps inside the tile.\n\nProcedural approximations for games, previews and look development. Height, occlusion and curvature are derived from the generated height field, not measured from real materials. The preview is a single-light illustration.", "tags": [ "apps" ], "x-mcp-tool": "renderloom_material_graph", "x-owner-app": "renderloom", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/RenderloomMaterialGraphInput" }, "examples": { "example1": { "summary": "Red brick wall", "value": { "preset": "brick" } }, "example2": { "summary": "Cobblestones with roughness from curvature, new seed", "value": { "preset": "stone", "seed": 42, "size": 192 } }, "example3": { "summary": "Custom graph: warped Voronoi tiles", "value": { "preset": "custom", "size": 128, "graph": "{\"format\":\"renderloom-material-graph\",\"version\":1,\"name\":\"Warped tiles\",\"size\":128,\"seed\":3,\"nodes\":[{\"id\":\"cells\",\"type\":\"voronoi\",\"params\":{\"mode\":\"edge\",\"scaleX\":4,\"scaleY\":4,\"jitter\":0.6}},{\"id\":\"wobble\",\"type\":\"noise\",\"params\":{\"kind\":\"simplex\",\"scaleX\":3,\"scaleY\":3,\"octaves\":3}},{\"id\":\"warped\",\"type\":\"warp\",\"params\":{\"strength\":0.04},\"inputs\":{\"source\":\"cells\",\"warpX\":\"wobble\"}},{\"id\":\"tiles\",\"type\":\"levels\",\"params\":{\"inHigh\":0.2},\"inputs\":{\"source\":\"warped\"}},{\"id\":\"paint\",\"type\":\"colorize\",\"params\":{\"low\":\"#203040\",\"high\":\"#d0a060\"},\"inputs\":{\"source\":\"tiles\"}},{\"id\":\"out\",\"type\":\"output\",\"inputs\":{\"baseColor\":\"paint\",\"height\":\"tiles\"}}]}" } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/RenderloomMaterialGraphResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "RenderloomMaterialGraphInput": { "type": "object", "additionalProperties": false, "properties": { "preset": { "title": "Material graph", "type": "string", "enum": [ "brick", "wood", "stone", "metal", "fabric", "custom" ], "default": "brick" }, "graph": { "title": "Graph JSON (for a custom graph)", "description": "Format renderloom-material-graph version 1 (schema at /static/apps/renderloom/material-graph.schema.json). Copy it from Renderloom → Material Nodes.", "type": "string", "maxLength": 200000, "default": "" }, "size": { "title": "Map size (px)", "type": "integer", "minimum": 64, "maximum": 512, "default": 256 }, "seed": { "title": "Graph seed (−1 keeps the graph’s seed)", "type": "integer", "minimum": -1, "maximum": 999999, "default": -1 } }, "required": [] }, "RenderloomMaterialGraphResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "project", "size", "seed", "nodes", "continuity", "sphere", "plane", "maps", "archive", "projectFile", "openInApp" ], "properties": { "project": { "$schema": "https://json-schema.org/draft/2020-12/schema", "title": "Renderloom material graph", "type": "object", "additionalProperties": false, "required": [ "format", "version", "name", "size", "seed", "nodes" ], "properties": { "format": { "const": "renderloom-material-graph" }, "version": { "const": 1 }, "name": { "type": "string", "minLength": 1, "maxLength": 120 }, "size": { "type": "integer", "minimum": 16, "maximum": 1024 }, "seed": { "type": "integer", "minimum": 0, "maximum": 999999 }, "nodes": { "type": "array", "minItems": 1, "maxItems": 48, "items": { "oneOf": [ { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "noise" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "kind": { "enum": [ "perlin", "value", "simplex" ] }, "style": { "enum": [ "fbm", "turbulence", "ridged" ] }, "scaleX": { "type": "integer", "minimum": 1, "maximum": 256 }, "scaleY": { "type": "integer", "minimum": 1, "maximum": 256 }, "octaves": { "type": "integer", "minimum": 1, "maximum": 8 }, "persistence": { "type": "number", "minimum": 0, "maximum": 1 }, "contrast": { "type": "number", "minimum": 0.1, "maximum": 4 }, "seed": { "type": "integer", "minimum": 0, "maximum": 9999 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": {} } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "voronoi" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "mode": { "enum": [ "f1", "f2", "edge", "cells" ] }, "scaleX": { "type": "integer", "minimum": 1, "maximum": 256 }, "scaleY": { "type": "integer", "minimum": 1, "maximum": 256 }, "jitter": { "type": "number", "minimum": 0, "maximum": 1 }, "metric": { "enum": [ "euclidean", "manhattan", "chebyshev" ] }, "seed": { "type": "integer", "minimum": 0, "maximum": 9999 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": {} } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "gradient" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "kind": { "enum": [ "linear-x", "linear-y", "wave-x", "wave-y", "wave-diagonal", "radial", "checker" ] }, "repeat": { "type": "integer", "minimum": 1, "maximum": 128 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": {} } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "bricks" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "mode": { "enum": [ "height", "cell" ] }, "columns": { "type": "integer", "minimum": 1, "maximum": 64 }, "rows": { "type": "integer", "minimum": 1, "maximum": 128 }, "offset": { "type": "number", "minimum": 0, "maximum": 1 }, "mortar": { "type": "number", "minimum": 0, "maximum": 0.5 }, "bevel": { "type": "number", "minimum": 0, "maximum": 0.5 }, "seed": { "type": "integer", "minimum": 0, "maximum": 9999 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": {} } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "value" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "value": { "type": "number", "minimum": 0, "maximum": 1 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": {} } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "color" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "color": { "type": "string", "pattern": "^#[0-9a-fA-F]{6}$" } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": {} } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "blend" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "mode": { "enum": [ "normal", "multiply", "screen", "overlay", "soft-light", "hard-light", "add", "difference", "exclusion", "darken", "lighten", "color-dodge", "color-burn" ] }, "opacity": { "type": "number", "minimum": 0, "maximum": 1 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "a": { "type": "string" }, "b": { "type": "string" }, "mask": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "warp" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "strength": { "type": "number", "minimum": 0, "maximum": 0.5 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "source": { "type": "string" }, "warpX": { "type": "string" }, "warpY": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "levels" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "inLow": { "type": "number", "minimum": 0, "maximum": 0.99 }, "inHigh": { "type": "number", "minimum": 0.01, "maximum": 1 }, "gamma": { "type": "number", "minimum": 0.1, "maximum": 10 }, "outLow": { "type": "number", "minimum": 0, "maximum": 1 }, "outHigh": { "type": "number", "minimum": 0, "maximum": 1 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "source": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "curves" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "points": { "type": "string", "maxLength": 400 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "source": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "invert" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": {} }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "source": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "blur" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "radius": { "type": "number", "minimum": 0, "maximum": 0.1 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "source": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "colorize" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "low": { "type": "string", "pattern": "^#[0-9a-fA-F]{6}$" }, "mid": { "type": "string", "maxLength": 400 }, "high": { "type": "string", "pattern": "^#[0-9a-fA-F]{6}$" } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "source": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "normal" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "depth": { "type": "number", "minimum": 0, "maximum": 0.25 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "height": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "ao" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "radius": { "type": "number", "minimum": 0.002, "maximum": 0.2 }, "depth": { "type": "number", "minimum": 0, "maximum": 0.25 }, "strength": { "type": "number", "minimum": 0, "maximum": 2 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "height": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "curvature" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "radius": { "type": "number", "minimum": 0.002, "maximum": 0.1 }, "depth": { "type": "number", "minimum": 0, "maximum": 0.25 }, "strength": { "type": "number", "minimum": 0, "maximum": 8 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "height": { "type": "string" } } } } }, { "type": "object", "additionalProperties": false, "required": [ "id", "type" ], "properties": { "id": { "type": "string", "pattern": "^[a-z][a-z0-9-]{0,23}$" }, "type": { "const": "output" }, "label": { "type": "string", "maxLength": 60 }, "params": { "type": "object", "additionalProperties": false, "properties": { "normalDepth": { "type": "number", "minimum": 0, "maximum": 0.25 } } }, "inputs": { "type": "object", "additionalProperties": false, "properties": { "baseColor": { "type": "string" }, "height": { "type": "string" }, "roughness": { "type": "string" }, "metallic": { "type": "string" }, "ao": { "type": "string" }, "normal": { "type": "string" } } } } } ] } } } }, "size": { "type": "integer" }, "seed": { "type": "integer" }, "nodes": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "id", "type", "kind", "min", "max", "mean" ], "properties": { "id": { "type": "string" }, "type": { "type": "string" }, "kind": { "enum": [ "g", "c" ] }, "min": { "type": "number" }, "max": { "type": "number" }, "mean": { "type": "number" } } } }, "continuity": { "type": "object", "additionalProperties": false, "required": [ "baseColor", "height" ], "properties": { "baseColor": { "type": "object", "additionalProperties": false, "required": [ "wrapMean", "interiorMean", "wrapMax", "interiorMax", "seamless" ], "properties": { "wrapMean": { "type": "number" }, "interiorMean": { "type": "number" }, "wrapMax": { "type": "number" }, "interiorMax": { "type": "number" }, "seamless": { "type": "boolean" } } }, "height": { "type": "object", "additionalProperties": false, "required": [ "wrapMean", "interiorMean", "wrapMax", "interiorMax", "seamless" ], "properties": { "wrapMean": { "type": "number" }, "interiorMean": { "type": "number" }, "wrapMax": { "type": "number" }, "interiorMax": { "type": "number" }, "seamless": { "type": "boolean" } } } } }, "sphere": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "plane": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "maps": { "type": "object", "additionalProperties": false, "required": [ "baseColor", "normal", "roughness", "metallic", "ao", "height" ], "properties": { "baseColor": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "normal": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "roughness": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "metallic": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "ao": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "height": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } } } }, "archive": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "projectFile": { "type": "object", "additionalProperties": false, "required": [ "artifactId", "filename", "mime", "bytes", "sha256", "path" ], "properties": { "artifactId": { "type": "string" }, "filename": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "sha256": { "type": "string" }, "path": { "type": "string", "description": "Download path on the same site (valid for about 2 hours)." } } }, "openInApp": { "type": [ "string", "null" ] } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }