diff --git a/COMPARISON.md b/COMPARISON.md
index 51d8c48..b7d61cf 100644
--- a/COMPARISON.md
+++ b/COMPARISON.md
@@ -14,7 +14,7 @@ Here I'd like to give an overview of what the validators are capable of and what
 
 |                            | Python Validator                           | PySTAC              | STAC Node Validator |
 | :------------------------- | ------------------------------------------ | ------------------- | ------------------- |
-| Validator Version          | 1.0.1                                      | 0.5.2               | 0.4.8               |
+| Validator Version          | 1.0.1                                      | 0.5.2               | 1.0.0               |
 | Language                   | Python 3.6                                 | Python 3            | NodeJS              |
 | CLI                        | Yes                                        | No                  | Yes                 |
 | Programmatic               | Yes                                        | Yes                 | Planned             |
diff --git a/README.md b/README.md
index 7fbc8ea..09cacf3 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,11 @@ See the [STAC Validator Comparison](COMPARISON.md) for the features supported by
 
 ## Versions
 
-**Current version: 0.4.8**
+**Current version: 1.0.0**
 
 | STAC Node Validator Version | Supported STAC Versions |
 | --------------------------- | ----------------------- |
-| >= 0.4.0                    | >= 1.0.0-beta.2         |
+| 0.4.x / 1.0.0               | >= 1.0.0-beta.2         |
 | 0.3.0                       | 1.0.0-beta.2            |
 | 0.2.1                       | 1.0.0-beta.1            |
 
@@ -36,6 +36,7 @@ Instead of paths to local files, you can also use HTTP(S) URLs. Other protocols
 Further options to add to the commands above:
 
 - To validate against schemas in a local STAC folder (e.g. `dev` branch): `--schemas /path/to/stac/folder`
+- To validate against a specific local schema (e.g. an external extension): `--schemaMap https://stac-extensions.github.io/foobar/v1.0.0/schema.json=./json-schema.schema.json`
 - To not verify SSL/TLS certificates: `--ignoreCerts`
 - Add `--verbose` to get a more detailed output
 - To lint local JSON files: `--lint` (add `--verbose` to get a diff with the changes required)
diff --git a/index.js b/index.js
index a260e75..be30448 100644
--- a/index.js
+++ b/index.js
@@ -6,7 +6,7 @@ const fs = require('fs-extra');
 const klaw = require('klaw');
 const path = require('path')
 const minimist = require('minimist');
-const compareVersions = require('compare-versions');
+const versions = require('compare-versions');
 const {diffStringsUnified} = require('jest-diff');
 const package = require('./package.json');
 
@@ -42,6 +42,7 @@ let ajv = new Ajv({
 	logger: DEBUG ? console : false
 });
 let verbose = false;
+let schemaMap = {};
 
 async function run() {
 	console.log(`STAC Node Validator v${package.version}\n`);
@@ -77,6 +78,20 @@ async function run() {
 			}
 		}
 
+		if (typeof args.schemaMap === 'string') {
+			let map = args.schemaMap.split(';');
+			for(let row of map) {
+				let parts = row.split("=");
+				let stat = await fs.lstat(parts[1]);
+				if (stat.isFile()) {
+					schemaMap[parts[0]] =  parts[1];
+				}
+				else {
+					console.error(`Schema mapping for ${parts[0]} is not a valid file: ${parts[1]}`);
+				}
+			}
+		}
+
 		const doLint = (typeof args.lint !== 'undefined');
 		const doFormat = (typeof args.format !== 'undefined');
 	
@@ -160,7 +175,6 @@ async function run() {
 
 			let fileValid = true;
 			for(let data of entries) {
-
 				let id = '';
 				if (isApiList) {
 					id = `${data.id}: `;
@@ -170,7 +184,7 @@ async function run() {
 					fileValid = false;
 					continue;
 				}
-				else if (compareVersions(data.stac_version, '1.0.0-beta.2', '<')) {
+				else if (versions.compare(data.stac_version, '1.0.0-beta.2', '<')) {
 					console.error(`-- ${id}Skipping; Can only validate STAC version >= 1.0.0-beta.2\n`);
 					continue;
 				}
@@ -187,11 +201,11 @@ async function run() {
 					console.warn(`-- ${id}Skipping; STAC ItemCollections not supported yet\n`);
 					continue;
 				}
-				else if (typeof data.extent !== 'undefined' || typeof data.license !== 'undefined') {
+				else if (data.type === "Collection" || typeof data.extent !== 'undefined' || typeof data.license !== 'undefined') {
 					type = 'collection';
 
 				}
-				else if (typeof data.description !== 'undefined') {
+				else if (data.type === "Catalog" || typeof data.description !== 'undefined') {
 					type = 'catalog';
 				}
 				else {
@@ -315,6 +329,10 @@ async function loadSchema(baseUrl = null, version = null, shortcut = null) {
 		url = baseUrl;
 	}
 
+	if (schemaMap[url]) {
+		url = schemaMap[url];
+	}
+
 	if (typeof COMPILED[url] !== 'undefined') {
 		return COMPILED[url];
 	}
diff --git a/package.json b/package.json
index e071c5b..e57d116 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "stac-node-validator",
-  "version": "0.4.8",
+  "version": "1.0.0",
   "description": "STAC Validator for NodeJS",
   "author": "Matthias Mohr",
   "license": "Apache-2.0",