unfinished proposal; add to build

Author: gregsdennis

package.json

@@ -6,9 +6,10 @@
   "main": "index.js",
   "scripts": {
     "lint": "eslint build/",
-    "build": "npm run build-core && npm run build-validation",
+    "build": "npm run build-core && npm run build-validation build-propertyDependencies",
     "build-core": "node build/build.js < jsonschema-core.md > jsonschema-core.html",
-    "build-validation": "node build/build.js < jsonschema-validation.md > jsonschema-validation.html"
+    "build-validation": "node build/build.js < jsonschema-validation.md > jsonschema-validation.html",
+    "build-propertyDependencies": "node build/build.js < proposals/propertyDependencies.md > proposals/propertyDependencies.html"
   },
   "license": "MIT",
   "dependencies": {

proposals/propertyDependencies.md

@@ -0,0 +1,78 @@
+# JSON Schema Proposal: `propertyDependencies` Keyword
+
+## Abstract
+
+This document proposes a change to the JSON Schema Core specification and
+Applicator vocabulary by adding the `propertyDependencies` keyword.
+
+## Note to Readers
+
+The issues list for this proposal can be found at
+<https://github.com/json-schema-org/json-schema-spec/issues?q=is%3Aissue+propertydependencies>.
+
+For additional information, see <https://json-schema.org/>.
+
+To provide feedback, use this issue tracker or any of the communication methods
+listed on the homepage.
+
+## Table of Contents
+
+## Conventions and Terminology
+
+All conventions and terms used and defined by the JSON Schema Core specification
+also apply to this document.
+
+## Overview
+
+### Problem Statement
+
+<!-- What problem exists that needs solving? -->
+
+### Solution
+
+<!-- What is the solution? -->
+
+### Alternatives
+
+<!-- What other options have been considered? (summary, not detailed) -->
+
+### Limitations
+
+<!-- Are there any limitations inherent to the proposal? -->
+
+### Examples
+
+<!-- How will this feature be used? -->
+
+## Proposal
+
+### Target for Change
+
+<!-- Where does this change go? -->
+
+This proposal will add the {{propertyDependencies}} section contained herein as
+a subsection of JSON Schema Core, section 10.2.2 "Keywords for Applying
+Subschemas Conditionally."
+
+<!-- What is the exact change? -->
+
+### New Keyword: `propertyDependencies` {#propertyDependencies}
+
+This keyword specifies subschemas that are evaluated if the instance is an
+object and contains a certain property with a certain string value.
+
+This keyword's value MUST be an object. Each value in the object MUST be an
+object whose values MUST be valid JSON Schemas.
+
+If the outer object key is a property in the instance and the inner object key
+is equal to the value of that property, the entire instance must validate
+against the schema. Its use is dependent on the presence and value of the
+property.
+
+Omitting this keyword has the same behavior as an empty object.
+
+## Champions
+
+| Champion                   | Company | Email                   | URI                              |
+|----------------------------|---------|-------------------------|----------------------------------|
+| Jason Desrosiers           | Postman | <tbd> | <https://github.com/jdesrosiers> |