Hi, After I had formulated the query in Basex-GUI, I tried to execute the same multi-line query in R/RbaseX. Nada ;-( In R, one can use the paste function to concatenate strings. I use this function to build a string which is passed to the RbaseX-client. Example: Stmt_1 <- "for $i in 1 to 2 return $i" => OK Stmt_2 <- paste0("for $i in 1 to 2", => ERROR "return $i") It took 2 days of debugging before I found the error. Stmt_2 is concatenated to "for $i in 1 to 2return $i" and it is clear that this can't be executed. Instead of using the "paste0"-function I should have used "paste" which introdus a space between the strings to be concatenated. This works fine. My problem is that the server/my client does not give an error-message. And this leads me to following question: It would be helpfull if the syntax for the XQuery statement was checked before sending to the server. Where in the BaseX sources can I find the code for XQuery checking? Is it possible to translate tist code into R or is that way to difficult? Ben Engbers
Hi Ben, An XQuery string is parsed by the QueryParser class [1]. It’s the largest Java class in the project, so it might take some time to get it reimplemented in R. Groetjes, Christian [1] https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/ba... On Thu, Feb 17, 2022 at 11:32 AM Ben Engbers <Ben.Engbers@be-logical.nl> wrote:
Hi,
After I had formulated the query in Basex-GUI, I tried to execute the same multi-line query in R/RbaseX. Nada ;-( In R, one can use the paste function to concatenate strings. I use this function to build a string which is passed to the RbaseX-client. Example: Stmt_1 <- "for $i in 1 to 2 return $i" => OK Stmt_2 <- paste0("for $i in 1 to 2", => ERROR "return $i") It took 2 days of debugging before I found the error. Stmt_2 is concatenated to "for $i in 1 to 2return $i" and it is clear that this can't be executed. Instead of using the "paste0"-function I should have used "paste" which introdus a space between the strings to be concatenated. This works fine.
My problem is that the server/my client does not give an error-message. And this leads me to following question: It would be helpfull if the syntax for the XQuery statement was checked before sending to the server. Where in the BaseX sources can I find the code for XQuery checking? Is it possible to translate tist code into R or is that way to difficult?
Ben Engbers
Hi Christian I know that the R community is still looking for a XQuery tool. I won't say that RBaseX is the best but for the moment it is the best option I know of ;-). And bugs are becoming more and more rare (and difficult to resolve ;-(). Even after my retirement I spent a lot of time programming and working on the client gives me great fun. And introducing a syntax-checker would improve the usability. I'll take a look at het QueryParser class and see if I can manage to implement it in R. Gruesse, Ben PS. I've nearly completed a text that I mean to present to R-bloggers and in which I present my client. Would you care giving it a look? Op 17-02-2022 om 14:38 schreef Christian Grün:
Hi Ben,
An XQuery string is parsed by the QueryParser class [1]. It’s the largest Java class in the project, so it might take some time to get it reimplemented in R.
Groetjes, Christian
Like the R community, I too am looking for a good query tool/service -- particularly one that leverages the semantics and structure of the StratML schema. That's why I recently subscribed to this listserv, to see if BaseX might be well suited to that purpose <https://stratml.us/carmel/iso/SMLTASwStyle.xml#_15446932-208f-11e6-a80e-7333871eb3cb>. This group is more technically oriented than my interests. So I probably will be unsubscribing. However, if anyone has any leads on how I might engage those with the capabilities to provide a StratML-enabled query service, please let me know. BTW, rOpenSci's about statement is now available in StratML format at https://stratml.us/drybridge/index.htm#ROS To the degree they are aiming to build a /Truly Connected/ community of results <https://connectedcommunity.net/> (CoR), they may wish to consider the opportunity to leverage the StratML standard and supportive tools, apps, and services <https://stratml.us/carmel/iso/SMLTASwStyle.xml> in support of realization of their mission <https://stratml.us/carmel/iso/ROSwStyle.xml#_084e0c3e-9013-11ec-b291-a05b0a83ea00>. Owen https://www.linkedin.com/in/owenambur/ On 2/17/2022 11:17 AM, Ben Engbers wrote:
Hi Christian
I know that the R community is still looking for a XQuery tool. I won't say that RBaseX is the best but for the moment it is the best option I know of ;-). And bugs are becoming more and more rare (and difficult to resolve ;-(). Even after my retirement I spent a lot of time programming and working on the client gives me great fun. And introducing a syntax-checker would improve the usability. I'll take a look at het QueryParser class and see if I can manage to implement it in R.
Gruesse,
Ben
PS. I've nearly completed a text that I mean to present to R-bloggers and in which I present my client. Would you care giving it a look?
Op 17-02-2022 om 14:38 schreef Christian Grün:
Hi Ben,
An XQuery string is parsed by the QueryParser class [1]. It’s the largest Java class in the project, so it might take some time to get it reimplemented in R.
Groetjes, Christian
participants (4)
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Ben Engbers -
Ben Engbers -
Christian Grün -
Owen Ambur