I think i found a case where a timing point is removed:
<?xml version="1.0" encoding="UTF-8"?><Pport xmlns="
http://www.thalesgroup.com/rtti/PushPort/v12"
xmlns:ns2="
http://www.thalesgroup.com/rtti/PushPort/Schedules/v1"
ts="2015-09-28T11:32:53.0856998+01:00" version="12.0">
<uR updateOrigin="Tyrell">
<schedule rid="201509281185265" ssd="2015-09-28" toc="SE" trainId="2H33" uid="W27074">
<ns2:OR act="TB" can="true" ptd="11:33" tpl="CANONST" wtd="11:33"/>
<ns2:PP can="true" tpl="BORMRKJ" wtp="11:35"/>
<ns2:OR act="TB" planAct="T " pta="11:36" ptd="11:37" tpl="LNDNBDE" wta="11:36" wtd="11:37"/>
<ns2:PP tpl="NKENTEJ" wtp="11:41"/>
<ns2:IP act="T " pta="11:42" ptd="11:43" tpl="NWCROSS" wta="11:42" wtd="11:43"/>
<ns2:PP tpl="STJOHNS" wtp="11:44:30"/>
<ns2:PP tpl="LEWISHM" wtp="11:45"/>
<ns2:PP tpl="PKBGJN" wtp="11:45:30"/>
<ns2:PP tpl="HTHRGRN" wtp="11:48"/>
<ns2:PP tpl="GRVPK" wtp="11:50"/>
<ns2:PP tpl="ELMW" wtp="11:51"/>
<ns2:PP tpl="CHSLHRS" wtp="11:52"/>
<ns2:PP tpl="PETSWDJ" wtp="11:53"/>
<ns2:PP tpl="PETSWD" wtp="11:54"/>
<ns2:IP act="T " pta="11:55" ptd="11:56" tpl="ORPNGTN" wta="11:55" wtd="11:56"/>
<ns2:PP can="true" tpl="CHLSFLD" wtp="11:57"/>
<ns2:IP act="T " pta="11:57" ptd="11:57" tpl="CHLSFLD" wta="11:57" wtd="11:57"/>
<ns2:PP can="true" tpl="KNCKHLT" wtp="11:58"/>
<ns2:IP act="T " pta="11:58" ptd="11:58" tpl="KNCKHLT" wta="11:58" wtd="11:58"/>
<ns2:IP act="T " pta="11:59" ptd="11:59" tpl="DTNG" wta="11:59" wtd="11:59"/>
<ns2:PP can="true" tpl="DTNG" wtp="12:02"/>
<ns2:IP act="T " pta="12:05" ptd="12:05" tpl="SVNOAKS" wta="12:04:30" wtd="12:05:30"/>
<ns2:IP act="T " pta="12:11" ptd="12:11" tpl="HLDNBRO" wta="12:11" wtd="12:11:30"/>
<ns2:DT act="TF" planAct="T " pta="12:15" ptd="12:17" tpl="TONBDG" wta="12:15" wtd="12:17"/>
<ns2:PP can="true" tpl="SMHLTUN" wtp="12:19"/>
<ns2:IP act="T " can="true" pta="12:23" ptd="12:23" tpl="HBROOMS" wta="12:23" wtd="12:23:30"/>
<ns2:PP can="true" tpl="TUNWTJN" wtp="12:25"/>
<ns2:DT act="TF" can="true" pta="12:27" tpl="TUNWELL" wta="12:27"/>
<ns2:cancelReason>179</ns2:cancelReason>
</schedule>
</uR>
</Pport>
to
<?xml version="1.0" encoding="UTF-8"?><Pport xmlns="
http://www.thalesgroup.com/rtti/PushPort/v12"
xmlns:ns2="
http://www.thalesgroup.com/rtti/PushPort/Schedules/v1"
ts="2015-09-28T11:40:35.1272903+01:00" version="12.0">
<uR updateOrigin="Workstation">
<schedule rid="201509281185265" ssd="2015-09-28" toc="SE" trainId="2H33" uid="W27074">
<ns2:OR act="TB" ptd="11:33" tpl="CANONST" wtd="11:33"/>
<ns2:PP tpl="BORMRKJ" wtp="11:35"/>
<ns2:IP act="T " pta="11:36" ptd="11:37" tpl="LNDNBDE" wta="11:36" wtd="11:37"/>
<ns2:PP tpl="NKENTEJ" wtp="11:41"/>
<ns2:IP act="T " pta="11:42" ptd="11:43" tpl="NWCROSS" wta="11:42" wtd="11:43"/>
<ns2:PP tpl="STJOHNS" wtp="11:44:30"/>
<ns2:PP tpl="PKBGJN" wtp="11:45:30"/>
<ns2:PP tpl="HTHRGRN" wtp="11:48"/>
<ns2:PP tpl="GRVPK" wtp="11:50"/>
<ns2:PP tpl="CHSLHRS" wtp="11:52"/>
<ns2:PP tpl="PETSWDJ" wtp="11:53"/>
<ns2:IP act="T " pta="11:55" ptd="11:56" tpl="ORPNGTN" wta="11:55" wtd="11:56"/>
<ns2:IP act="T " pta="12:05" ptd="12:05" tpl="SVNOAKS" wta="12:04:30" wtd="12:05:30"/>
<ns2:IP act="T " pta="12:11" ptd="12:11" tpl="HLDNBRO" wta="12:11" wtd="12:11:30"/>
<ns2:IP act="T " pta="12:15" ptd="12:17" tpl="TONBDG" wta="12:15" wtd="12:17"/>
<ns2:PP tpl="SMHLTUN" wtp="12:19"/>
<ns2:IP act="T " pta="12:23" ptd="12:23" tpl="HBROOMS" wta="12:23" wtd="12:23:30"/>
<ns2:PP tpl="TUNWTJN" wtp="12:25"/>
<ns2:DT act="TF" pta="12:27" tpl="TUNWELL" wta="12:27"/>
</schedule>
</uR>
</Pport>
What is a workstation updated?