added links to PAC and axes4

accessibility-of-documents/README.md

@@ -39,7 +39,7 @@ The table below shows a mapping between document types, standards and technologi
 
 | Document type 	| Standards/Documentation                                                       	| Technologies (authoring)                            	| Technologies (conversion) 	| Evaluation |
 | ---------------	| -----------------------------------------------------------------	| -----------------------------------------------------	| ---------------------------	| ----- |
-| pdf           	| [pdf/UA](https://www.pdfa.org/publication/pdfua-in-a-nutshell/)	| [Tools](https://www.pdfa.org/pdfua-creation-tools/) 	|                           	||
+| pdf           	| [pdf/UA](https://www.pdfa.org/publication/pdfua-in-a-nutshell/)	| [Tools](https://www.pdfa.org/pdfua-creation-tools/), [axes4 Plugins](https://www.axes4.com) 	|                           	|[PAC](https://www.access-for-all.ch/ch/pdf-werkstatt/pdf-accessibility-checker-pac.html)|
 | doc(x)        	|                                                                 	| Office 365 integrated                               	|                           	||
 | ppt(x)        	|                                                                 	|                                                     	| Office 365 integrated     	||
 | Web           	| [WCAG](https://levelaccess.zoom.us/recording/play/NjAwLUmOM5lEPtGYPxls_ov6H1kNqwpz4r0W-hk5WzRAN76IV3EL1h8XWyZIYeWl?startTime=1537379538000), [WCAG webinar](https://levelaccess.zoom.us/recording/play/NjAwLUmOM5lEPtGYPxls_ov6H1kNqwpz4r0W-hk5WzRAN76IV3EL1h8XWyZIYeWl), [WAI-ARIA](https://www.w3.org/WAI/standards-guidelines/aria/), [ARIA authoring practices](https://www.w3.org/TR/wai-aria-practices/),...                                             	|                                                     	|                           	|[wave](http://wave.webaim.org/)|