Update README.md

README.md

@@ -9,39 +9,15 @@
 Allows create custom [`ol.TileUrlFunctionType`](http://openlayers.org/en/latest/apidoc/ol.html#.TileUrlFunctionType) to load tiles 
 seeded with [TileCache](http://tilecache.org/).
 
-`ol-tilecache` **v3.x** is aiming to support **OpenLayers 5**. To use it with previous versions of the OpenLayers
-you should install **v2.x** version. 
-
 ## Installation
 
-Install it with NPM (recommended):
+Install it with NPM (**recommended**):
 
 ```shell
 # ES6 version for bundling with Webpack, Rollup and etc.
 npm install ol ol-tilecache
-
-# to use with old `openlayers` package (not recommended)
-npm install openlayers ol-tilecache
-```
-
-Or add from CDN:
-
-```html
-<script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.0.2/build/ol.js"></script>
-<script src="https://unpkg.com/ol-tilecache@latest/dist/bundle.min.js"></script>
 ```
 
-### Note
-**Plugin is available in 2 versions: as UMD module and as ES2015 module:**
-- **RECOMMENDED: ES2015 version (`dist/bundle.es.js`) should be used with [ol](https://www.npmjs.com/package/ol) package (you should
-  install it manually).**
-- **UMD version (`dist/bundle[.min].js`) should be used with deprecated [openlayers](https://www.npmjs.com/package/openlayers) package.
-  You can install `ol` package as dev dependency to suppress NPM warning about required peer dependencies.**
-
-## Usage
-
-Plugin may be used as ES2015 module (**recommended** with support of ol v5):
-
 ```js
 // Use as ES2015 module (based on NPM package `ol`)
 import Map from 'ol/Map'
@@ -51,25 +27,28 @@ import * as TileCacheUrlFn from 'ol-tilecache'
 import { createTileUrlFunction } from 'ol-tilecache'
 ```
 
-Usage with deprecated `openlayers` package (ol v4)
-
-```js
-// Use as UMD module (based on NPM package `openlayers`)
-const ol = require('openlayers')
-...
-const TileCacheUrlFn = require('ol-tilecache')
-```
+Or add from CDN:
 
-In Browser environment you should add **script** tag pointing to UMD module after OpenLayers js files.
 ```html
-<script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.0.2/build/ol.js"></script>
+<script src="https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.0.0/build/ol.js"></script>
 <script src="https://unpkg.com/ol-tilecache@latest/dist/bundle.min.js"></script>
 <script>
   // plugin exports global variable TileCacheUrlFn
   // in addition it also exported to `ol.tileCacheUrlFn` field (for backward compatibility).
 </script>
 ```
 
+### Note
+**Plugin is available in 2 versions: as UMD module and as ES2015 module:**
+- **RECOMMENDED: ES2015 version (`dist/bundle.es.js`) should be used with [ol](https://www.npmjs.com/package/ol) package (you should
+  install it manually).**
+- **UMD version (`dist/bundle[.min].js`) should be used with UMD [ol](https://cdn.jsdelivr.net/gh/openlayers/openlayers.github.io@master/en/v6.0.0/build/ol.js) package.
+  You can install `ol` package as dev dependency to suppress NPM warning about required peer dependencies.**
+
+## Usage
+
+Usage same as standard OpenLayers tile url functions.
+
 ### Members
 
 #### createTileUrlFunction
@@ -86,15 +65,16 @@ Available URL placeholders:
 z | 0z - zoom level (simple number or padded with zero)
 x1, x2, x3 - X axis index parts (remnant from dividing the tile X index on 10^9 broken down by 3 digits)
 y1, y2, y3 - Y axis index parts (remnant from dividing the tile Y index on 10^9 broken down by 3 digits)
+-y1, -y2, -y3 - inverted Y axis index parts (remnant from dividing the tile Y index on 10^9 broken down by 3 digits)
 ```
 
 ### Example usage:
 
 ```js
-import Map from 'ol/map'
-import View from 'ol/view'
-import TileLayer from 'ol/layer/tile'
-import XyzSource from 'ol/source/xyz'
+import Map from 'ol/Map'
+import View from 'ol/View'
+import TileLayer from 'ol/layer/Tile'
+import XyzSource from 'ol/source/XYZ'
 import { createTileUrlFunction } from 'ol-tilecache'
 
 const map = new Map({