BaseX-Talk

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5252 discussions

RESTXQ: Serve images that are not within the web app dir
by Eliot Kimber 07 Jul '22

07 Jul '22

In my RESTXQ application, I have the XML content in a database but the images referenced from that content is only in a local clone of the git repository from which the XML content is loaded into BaseX. I would like to serve the images from RESTXQ-generated HTML Pages but I’m not sure how to do that other than to use URLs that include the base64 image data directly. What I think I need to do is implement a RESTXQ end point that handles image URLs that I know how to convert into image files on the file system but I don’t see how to then return the raw bytes as the return result from the RESTXQ handler function. I’m trying to avoid copying the images because there’s no other reason to have them in a database or otherwise copy them somewhere else on the file system. I suppose I could symlink the git directories under the webapp directory but that seems kind of icky too. Thanks, E. _____________________________________________ Eliot Kimber Sr Staff Content Engineer O: 512 554 9368 M: 512 554 9368 servicenow.com<https://www.servicenow.com> LinkedIn<https://www.linkedin.com/company/servicenow> | Twitter<https://twitter.com/servicenow> | YouTube<https://www.youtube.com/user/servicenowinc> | Facebook<https://www.facebook.com/servicenow>

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Re: [basex-talk] Sym links in BaseX 9.7.2
by Maud Ingarao (IHRIM - ENS de Lyon) 07 Jul '22

07 Jul '22

Hi Christian :-) The prior version we were using was 9.3.2 and everything worked fine. Now with 9.7.2 I get this error : Stopped at /path/to/basex/webapp/synopsx/workspace/bvm/models/mixed.xqm, 38/55: [XQST0059] Could not retrieve module: /path/to/basex/webapp/synopsx/models/synopsx.xqm. although nothing changed in our webapp. Thanks a lot, and all the best :-) Maud

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How To: Sort nodes in document order?
by Eliot Kimber 04 Jul '22

04 Jul '22

I feel like I should know how to do this (and possibly I’ve previously been told how and have forgotten), but I’m at a loss. I am implementing a process that gathers nodes from a single document (a DITA map) and constructs a system of maps where I’m using the maps primarily to represent a tree and enable lookup of things by key. However, the order of the elements that make up these maps is also important (DITA’s rules for how you build DITA key spaces from maps depends entirely on document order). For example, I have a map that maps “key names” to the elements that declare those key names, i.e.: map { “key-01” : (<topicref keys=”key-01” href=”foo.dita”/>, <topicref keys=”key-01” href=”bar.dita”/>) } This is the initial state of the map (reflecting pass 1 over the DITA map document) but then I need to add additional elements to the sequence that is the value of entry “key-01” and I need the resulting sequence to be in document order. So my question: given two sequences of nodes from the same document, how does one construct a new sequence where the nodes are in document order? Thanks, Eliot _____________________________________________ Eliot Kimber Sr Staff Content Engineer O: 512 554 9368 M: 512 554 9368 servicenow.com<https://www.servicenow.com> LinkedIn<https://www.linkedin.com/company/servicenow> | Twitter<https://twitter.com/servicenow> | YouTube<https://www.youtube.com/user/servicenowinc> | Facebook<https://www.facebook.com/servicenow>

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Exporting XML with a relaxNG declaration
by France Baril 01 Jul '22

01 Jul '22

Hi, I am trying to output XML with a link to a RelaxNG schema without success. - It works with DTDs using doctype-public and doctype-systems in the serialization params of file:write - It works with .xsd because the declaration is in the attribute - For relaxNg, the intro line looks like a PI, but I can't seem to be able to keep PIs when outputting xml with file:write Specifically: let $map-params := map { 'method': 'xml', 'indent': 'no', 'omit-xml-declaration': 'no' } let $map := ( <?xml-model href="urn:oasis:names:tc:dita:rng:map.rng" schematypens="http://relaxng.org/ns/structure/2.x"?>, <map> <?test name="abc"?> <title>{lower-case($spez/child::*[name()='name']/text())}</title>{ <title>{lower-case($spez/child::*[name()='name']/text())}</title>{ ... }</map> ) return file:write($dir-path || '/spec-' || lower-case($spez/child::*[name()='name']/text()) || '.ditamap', $map) gets me: <map> <title>Tests for elements - version 2.0</title> ... </map> Both the declaration and the in-content test pi disappear. What am I missing here? -- France Baril Architecte documentaire / Documentation architect france.baril(a)architextus.com

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the implicit context of position
by Graydon Saunders 30 Jun '22

30 Jun '22

Hello -- I've got an element node that's part of a document. I need its position among the element children of its parent. $step/position() will (correctly!) always return 1, there's one thing in $step, of course it does. replace($step/path(),'^.*\[(\p{Nd}+)\]$','$1') => xs:integer() gets me the implicit position but is something of a horror. for $e at $in in $step/../* where $e is $step return $in works, too, but any notion of elegance and clarity have fled screaming into the night. I keep thinking there must be a better way; anyone got any suggestions? Thanks! Graydon

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Sym links in BaseX 9.7.2
by Maud Ingarao 30 Jun '22

30 Jun '22

Hi everybody ! As we had problems getting our formatDateTime() outputs in french, we followed Christian's advice and updated to BaseX 9.7.2. Now it works and we get our outputs in French, thanks a lot ! But we face a new problem : symbolic links inside the webapp are no longer followed. We tried to had the following to jetty.xml : | <Call name="addAliasCheck"> <Arg><New class="org.eclipse.jetty.server.handler.AllowSymLinkAliasChecker"/></Arg> </Call> | But this doesn't seem to be the answer. I can't remember configuring anything in particular in the previous versions of BaseX and our webapp was just running fine. Thanks for your help. Maud || -- Maud Ingarao IHRIM - UMR 5317 Institut d’histoire des représentations et des idées dans les modernités École Normale Supérieure de Lyon 15 Parvis René Descartes - BP7000 - 69342 Lyon CEDEX 07 +33 4 37 37 65 79 - maud.ingarao(a)ens-lyon.fr */Présente les lundi - mardi - mercredi/* */At the office on mondays - tuesdays - wednesdays/* http://ihrim.ens-lyon.fr/ http://ahn.ens-lyon.fr/ https://cahier.hypotheses.org/

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How To Determine if You're In Daylight Saving Time?
by Eliot Kimber 29 Jun '22

29 Jun '22

I’m showing times on RESTXQ generated pages that need to be adjusted for a particular time zone. Doing the time zone adjustment is easy enough but I realized that knowing whether or not a given time zone should be standard or daylight time is a challenge not directly addressed by the XQuery time functions. So my question: does anyone have a technique for determining if a given time zone or region is using DST? Of course I can hard-code some sort of DST calendar for the time zones I know I need (U.S. time zones, European Central Time, India Standard Time) but it seemed like there ought to be a more general solution somewhere. My server is running on Linux but is developed and tested on macOS. Thanks, Eliot _____________________________________________ Eliot Kimber Sr Staff Content Engineer O: 512 554 9368 M: 512 554 9368 servicenow.com<https://www.servicenow.com> LinkedIn<https://www.linkedin.com/company/servicenow> | Twitter<https://twitter.com/servicenow> | YouTube<https://www.youtube.com/user/servicenowinc> | Facebook<https://www.facebook.com/servicenow>

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Fonts problem with database list and system dialogs
by Jonathan Robie 28 Jun '22

28 Jun '22

I can't read the names of databases in my UI now - the font is tiny. And the systems dialogs I might otherwise be able to use to find and fix the problem also use tiny fonts. Other windows are fine. [image: image.png] Jonathan

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XPATH injection / escaping
by trichel 26 Jun '22

26 Jun '22

Hello, How to write secure queries when the queried text nodes contain ampersands? For instance: declare variable $publisher external; (: $pub == 'Faber & Faber' :) declare variable $db := db:open('db'); let $records := $db/record/publisher[. = $publisher] (: publisher == 'Faber & Faber' :) The external variable is unsafe input, escaped by the sending application. Escaping the ampersand in the external variable with & (& a m p ;) doesn't work, Basex stops finding hits. Just letting the ampersand pass might expose the code to injection attacks? I could switch to a full-text query and remove the ampersand from the external variable, but that's a bit hackish. The expression is exact. How to proceed in a secure way?

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Link Graph Construction: Anything I Can Crib or Learn From?
by Eliot Kimber 26 Jun '22

26 Jun '22

In the context of our Project Mirabel system that manages DITA content, I need to be able answer the question “for topic X, what other topics link to it directly or indirectly?” That is, say Topic A links to Topic B that Links to Topic C. Asking the question “What topics ultimately link to topic C?” I would like to get the answer “Topic A, Topic B”. Getting the answer for direct references is easy—I already build a where-used index that captures, for each DITA map or topic, what other maps and topics link directly to it. But to get the Topic A part of the answer I need some kind of link graph index and I’m not sure how best to go about calculating this or capturing it in some index or set of indexes. In our content the fan out from a single Topic C to the set of topics that ultimately reference it could be 10s of 1000s of topics. We have about 45K topics in the content for each version of the ServiceNow Platform and a number of topics that are used by a large number of other topics, so the explosion can be quite large. That suggests that a simple topic-to-ultimately-referenced-topics index would be very inefficient in that the entry for any given topic could potentially have 45K – 1 entries (we don’t care that a topic references itself). On the other hand, working backwards through chains of direct references can also be expensive and is probably too slow, so maybe the brute-force index is the best option? At the same time, I would like to be able to quickly visualize the link graph extending from or ending in any given topic or simply the link graph for the entire information set, which requires capturing the nodes and edges. My question: does anyone either have experience or insight into this kind of link graph challenge or know of relevant papers or general discussion of graph processing I might look at? Thanks, Eliot _____________________________________________ Eliot Kimber Sr Staff Content Engineer O: 512 554 9368 M: 512 554 9368 servicenow.com<https://www.servicenow.com> LinkedIn<https://www.linkedin.com/company/servicenow> | Twitter<https://twitter.com/servicenow> | YouTube<https://www.youtube.com/user/servicenowinc> | Facebook<https://www.facebook.com/servicenow>

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