在 R 中使用 XSLT 转换 XML [英] Convert XML using XSLT in R
问题描述
我的任务目前由 SQL Server Reporting Services 执行，它使用将典型架构转换为定制架构的 XSLT 将数据集导出为 XML 格式.为了替换这份报告，我需要能够在用户想要下载它时类似地转换 XML.
I have task currently being performed by SQL Server Reporting Services where it exports a dataset to an XML format using an XSLT that converts the typical schema to a bespoke one. In order to replace this report, I need to be able to similarly transform XML when the user wants to download it.
XSLT 生成的最终布局很糟糕 - 它涉及填充和各种奇怪的连接，我宁愿不通过在从数据到 XML 的第一次转换中进行整个转换来重新发明轮子.
The end layout produced by XSLT is horrible - it involves padding and all sorts of whacky concatenations and I'd rather not reinvent the wheel by doing the whole transformation in the first conversion from data to XML.
我的 google-fu 失败了:如何使用 R 通过 XSLT 转换 XML?
My google-fu has failed me: how do I convert XML via an XSLT using R?
这是一个使用 iris 数据并将其转换为 XML 的脚本(我使用 CRAN 中的包纯粹是为了保持示例中的代码级别较低).然后我有 一个 XSLT(在要点上)，当我在 Visual Studio 中运行 XML 时，它会转换XML，但我不知道如何将该活动转换为 R.
Here is a script that uses iris data and converts it to XML (I use my package from CRAN purely to keep the code level down on the example). I then have an XSLT (on gist) that when I run the XML through in Visual Studio converts the XML but I don't know how to translate that activity into R.
library(optiRum)
library(XML)
irisdata<-convertToXML(iris)
saveXML(irisdata,"iris.xml")
推荐答案
我想你正在寻找 Sxslt 包，只是使用示例数据
I think you're looking for Sxslt package, just using example data
library("Sxslt")
library("XML")
files <- sapply(c("sqrt.xml", "sqrt.xsl"), function(f) system.file("examples", f, package = "Sxslt"))
其中 files[1] 是一个 xml 文件，files[2] 是一个 xsl 文件
Where files[1] is an xml file and files[2] is an xsl file
xmlParse(files[[1]])
<?xml version="1.0"?>
<test>
<sqrt>9</sqrt>
<date/>
<code>mean(rnorm(10000))</code>
</test>
然后使用Sxslt应用样式表
xsltApplyStyleSheet(files[1], files[2])
给予
$doc
<?xml version="1.0" standalone="yes"?>
<HTML>
<body>
sqrt: 3
pow: 81
date: Thu Jan 15 06:46:54 2015<i class="output">-0.0140224652198879</i>
substring: an(rnor</body>
</HTML>
$stylesheet
An object of class "XSLStyleSheet"
Slot "ref":
<pointer: 0x108ef2a60>
$status
OK
0
attr(,"class")
[1] "XMLInternalXSLTDocument"
关于安装 Sxslt 的额外指导
- 你需要先在你的 linux 机器上安装
libxslt-dev - 最新版本不再适用于 R 3.1.2，也不会从源代码安装到 Bug #1 在它的 repo 上.好心的 bug 提出者拿了一个 fork 并修复了这个包，这样你就可以使用
devtools::install_github("cboettig/Sxslt")来安装它. - You will need to install
libxslt-devon your linux machine first - The latest build no longer works with R 3.1.2, nor will it install from source further to Bug #1 on it's repo. The kind raiser of the bug took a fork and fixed the package so you can use
devtools::install_github("cboettig/Sxslt")to install it.
Extra guidance on installing Sxslt
那个版本不再是了，但你可以使用:
That version is no longer up, but you can use:
install.packages("remotes")
remotes::install_github("omegahat/Sxslt")
这篇关于在 R 中使用 XSLT 转换 XML的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
