Index: Introduction.adoc
===================================================================
--- Introduction.adoc	(revision 122140)
+++ Introduction.adoc	(working copy)
@@ -171,7 +171,7 @@
 Packet API, netX Dual-Port Memory, Packet-based services, Revision 4, English, 2020-06.]
 
 |[[docref3]] [3]
-|Hilscher Gesellschaft für Systemautomation mbH: netX EtherCAT SubDevice HAL Documentation
+|Hilscher Gesellschaft für Systemautomation mbH: netX EtherCAT SubDevice HAL Documentation.
 // Muss geklärt werden pob das überhaupt hochgeladn werdendarf und wo.
 // Mail an Heinz am 4.8.2021
 // https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiv8u-9wZfyAhVDgP0HHWXjDAEQFnoECAoQAw&url=https%3A%2F%2Fkb.hilscher.com%2Fdownload%2Fattachments%2F77563688%2FEtherCAT%2520SubDevice%2520V4%2520Protocol%2520API%252009%2520EN.pdf%3Fversion%3D1%26modificationDate%3D1490624895215%26api%3Dv2&usg=AOvVaw3569rYImEnmuSjl0KcktuJ
@@ -190,39 +190,38 @@
 Protocol API, TCP/IP, Packet Interface, Revision 17, English, 2020-10.]
 
 |[[docref7]] [7]
-|IEC 61158 Part 2-6 Type 12 documents (also available for members of EtherCAT
-Technology Group as specification documents ETG-1000)
+|link:https://webstore.iec.ch/en/publication/66933[IEC 61158 Part 2-6.]
 
 |[[docref8]] [8]
-|IEC 61800-7
+|link:https://www.ethercat.org/en/downloads/downloads_C269A9D00FC544359918A7FCE4200BA6.htm[IEC 61800-7.]
 
 |[[docref9]] [9]
-|EtherCAT Specification Part 5 – Application Layer services specification. ETG1000.5
+|link:https://www.ethercat.org/de/downloads/downloads_A02E436C7A97479F9261FDFA8A6D71E5.htm[EtherCAT Specification Part 5 – Application Layer services specification. ETG1000.5.]
 
 |[[docref10]] [10]
-|EtherCAT Specification Part 6 – Application Layer protocol specification. ETG1000.6
+|link:https://www.ethercat.org/de/downloads/downloads_A02E436C7A97479F9261FDFA8A6D71E5.htm[EtherCAT Specification Part 6 – Application Layer protocol specification. ETG1000.6.]
 
 |[[docref11]] [11]
-|EtherCAT Protocol Enhancements. ETG1020
+|link:https://www.ethercat.org/de/downloads/downloads_B586C0F602494A808E976CC2BD492552.htm[EtherCAT Protocol Enhancements. ETG1020.]
 
 |[[docref12]] [12]
-|EtherCAT Indicator and Labeling Specification. ETG1300
+|link:https://www.ethercat.org/de/downloads/downloads_1F8117376A3A4C428EE04826E537523A.htm[EtherCAT Indicator and Labeling Specification. ETG1300.]
 
 |[[docref13]] [13]
-|EtherCAT SubDevice Information Specification ETG2000
+|link:https://www.ethercat.org/en/downloads/downloads_6A46D45EA33C47ECB2BB2686BBA963EC.htm[EtherCAT SubDevice Information Specification ETG2000.]
 
 |[[docref14]] [14]
-|EtherCAT SubDevice Information Annotation ETG2001
+|link:https://www.ethercat.org/en/downloads/downloads_6A46D45EA33C47ECB2BB2686BBA963EC.htm[EtherCAT SubDevice Information Annotation ETG2001.]
 
 |[[docref15]] [15]
-|SubDevice Information Interface (SII) ETG2010
+|link:https://www.ethercat.org/en/downloads/downloads_AC7ED92675B04BAB9ECD35667A80DFFE.htm[SubDevice Information Interface (SII) ETG2010.]
 
 |[[docref16]] [16]
-|Modular Device Profile ETG5001
+|link:https://www.ethercat.org/en/downloads/downloads_715D4CF690F241FDAD437BD1C3E0E5E4.htm[Modular Device Profile ETG5001.]
 
 |[[docref17]] [17]
-|Semiconductor Device Profile ETG5003
+|link:https://www.ethercat.org/en/downloads/downloads_AE90FE7D69324C6B8F79DDBAD4488DB7.htm[Semiconductor Device Profile ETG5003.]
 
 |[[docref18]] [18]
-|Conformancetest Specification ETG7000
+|link:https://www.ethercat.org/en/downloads/downloads_607A069210B14903BC77B711A53A7D9F.htm[Conformancetest Specification ETG7000.]
 |===