Ability to request the history of last X data items for a particular path

[simonyg]

Enhance sample query to support the concept of "To=" with a specified # of items.

Instead of "From=X" and "Count=Y" to retrieve Y data items starting from X, we want to find out the history of a particular path up to the sequence num X.

https://<authority>/sample?count=100&to=12345&path=//DataItem[@id='XYZ']

Last 100 data items of 'XYZ' before sequence num 12345

[wsobel]

we should add this to the agent working group on the MTConnect Projects site to add to the protocol.

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On Apr 1, 2020, at 16:38, Simon Yeung ***@***.***> wrote: Enhance sample query to support the concept of "To=" with a specified # of items. Instead of "From=X" and "Count=Y" to retrieve Y data items starting from X, we want to find out the history of a particular path up to the sequence num X. ***@***.*** <https://github.com/id>='XYZ'] Last 100 data items of 'XYZ' before sequence num 12345 — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#63>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAJ6BCNX4ITP7KJ6YRW22UTRKPF7LANCNFSM4LZWOCLQ>.

[wsobel]

Added: http://projects.mtconnect.org/issues/2227 <http://projects.mtconnect.org/issues/2227>

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On Apr 1, 2020, at 17:01, William Sobel ***@***.***> wrote: we should add this to the agent working group on the MTConnect Projects site to add to the protocol. > On Apr 1, 2020, at 16:38, Simon Yeung ***@***.*** ***@***.***>> wrote: > > > Enhance sample query to support the concept of "To=" with a specified # of items. > > Instead of "From=X" and "Count=Y" to retrieve Y data items starting from X, we want to find out the history of a particular path up to the sequence num X. > > http:///sample?count=100&to=12345&path=//DataItem[ ***@***.*** <https://github.com/id>='XYZ'] > > Last 100 data items of 'XYZ' before sequence num 12345 > > — > You are receiving this because you are subscribed to this thread. > Reply to this email directly, view it on GitHub <#63>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAJ6BCNX4ITP7KJ6YRW22UTRKPF7LANCNFSM4LZWOCLQ>. >

[wsobel]

Handled in issue #66