通过python将SLD从1.1转换为1.0

Question

我目前尝试通过编写python脚本将SLD(一种XML(从一个版本转换为另一个版本。我已经用头撞了将近两个星期了，我进展甚微。 我真的是 python 的新手，希望有任何建议！
基本上，我需要转动这个....

<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.1.0" xmlns="http://www.opengis.net/sld" 
xmlns:ogc="http://www.opengis.net/ogc" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:xlink="http://www.w3.org/1999/xlink" 
xsi:schemaLocation="http://www.opengis.net/sld 
http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd" 
xmlns:se="http://www.opengis.net/se">
<NamedLayer>
<se:Name>Custom_Landuse</se:Name>
<se:Description>
<se:Title>Custom_Landuse</se:Title>
<se:Abstract>A Land Use style</se:Abstract>
</se:Description>
<UserStyle>
<se:Name>County Electoral Division</se:Name>
<se:FeatureTypeStyle>
<se:Rule>
<se:Name>Woods</se:Name>
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>AREA_CODE</ogc:PropertyName>
<ogc:Literal>CED</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
<se:MinScaleDenominator>65000</se:MinScaleDenominator>
<se:MaxScaleDenominator>150000</se:MaxScaleDenominator>
<se:PolygonSymbolizer>
<se:Name>Woods</se:Name>
<se:Fill>
<se:SvgParameter name="fill">#228B22</se:SvgParameter>
<se:SvgParameter name="fill-opacity">0</se:SvgParameter>
</se:Fill>
<se:Stroke>
<se:SvgParameter name="stroke">#ADFF2F</se:SvgParameter>
<se:SvgParameter name="stroke-opacity"></se:SvgParameter>
<se:SvgParameter name="stroke-width">1.4</se:SvgParameter>
<se:SvgParameter name="stroke-linejoin">round</se:SvgParameter>
<se:SvgParameter name="stroke-linecap">round</se:SvgParameter>
</se:Stroke>
</se:PolygonSymbolizer>
<se:TextSymbolizer>
<se:Name>Woods</se:Name>
<se:Label>
<ogc:PropertyName>NAME</ogc:PropertyName>
</se:Label>
<se:Font>
<se:SvgParameter name="font-family">Sans-Serif</se:SvgParameter>
<se:SvgParameter name="font-style">normal</se:SvgParameter>
<se:SvgParameter name="font-size">20</se:SvgParameter>
<se:SvgParameter name="font-weight">bold</se:SvgParameter>
</se:Font>
<se:Fill>
<se:SvgParameter name="fill">#ADFF2F</se:SvgParameter>
</se:Fill>
</se:TextSymbolizer>
</se:Rule>
<se:Rule>
<se:Name>Grass</se:Name>
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>AREA_CODE</ogc:PropertyName>
<ogc:Literal>CED</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
<se:MinScaleDenominator>65000</se:MinScaleDenominator>
<se:MaxScaleDenominator>150000</se:MaxScaleDenominator>
<se:PolygonSymbolizer>
<se:Name>Grass</se:Name>
<se:Fill>
<se:SvgParameter name="fill">#90EE90</se:SvgParameter>
<se:SvgParameter name="fill-opacity">0</se:SvgParameter>
</se:Fill>
<se:Stroke>
<se:SvgParameter name="stroke">#6B8E23</se:SvgParameter>
<se:SvgParameter name="stroke-opacity"></se:SvgParameter>
<se:SvgParameter name="stroke-width">1.4</se:SvgParameter>
<se:SvgParameter name="stroke-linejoin">round</se:SvgParameter>
<se:SvgParameter name="stroke-linecap">round</se:SvgParameter>
</se:Stroke>
</se:PolygonSymbolizer>
<se:TextSymbolizer>
<se:Name>Grass</se:Name>
<se:Label>
<ogc:PropertyName>NAME</ogc:PropertyName>
</se:Label>
<se:Font>
<se:SvgParameter name="font-family">Sans-Serif</se:SvgParameter>
<se:SvgParameter name="font-style">normal</se:SvgParameter>
<se:SvgParameter name="font-size">20</se:SvgParameter>
<se:SvgParameter name="font-weight">bold</se:SvgParameter>
</se:Font>
<se:Fill>
<se:SvgParameter name="fill">#6B8E23</se:SvgParameter>
</se:Fill>
</se:TextSymbolizer>
</se:Rule>
</se:FeatureTypeStyle>
</UserStyle>

进入这个

<?xml version="1.0" encoding="UTF-8"?> 
<StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld" 
xmlns:ogc="http://www.opengis.net/ogc" 
xmlns:gml="http://www.opengis.net/gml"  
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:xlink="http://www.w3.org/1999/xlink" 
xsi:schemaLocation="http://www.opengis.net/sld 
http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd">
<NamedLayer>
<Name>Custom_Landuse</Name>
<UserStyle>
<Name>Land Use</Name>
<FeatureTypeStyle>
<Rule>
<Name>Woods</Name>
<Title>Woods - 1:65,000 to 1:150,000</Title>
<Abstract>A Land Use style</Abstract>
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>AREA_CODE</ogc:PropertyName>
<ogc:Literal>CED</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
<MinScaleDenominator>65000</MinScaleDenominator>
<MaxScaleDenominator>150000</MaxScaleDenominator>
<PolygonSymbolizer>
<Fill>
<CssParameter name="fill">#228B22</CssParameter>
<CssParameter name="fill-opacity">1</CssParameter>
</Fill>
<Stroke>
<CssParameter name="stroke">#ADFF2F</CssParameter>
<CssParameter name="stroke-opacity"></CssParameter>
<CssParameter name="stroke-width">1.4</CssParameter>
<CssParameter name="stroke-linejoin">round</CssParameter>
<CssParameter name="stroke-linecap">round</CssParameter>
</Stroke>
</PolygonSymbolizer>
<TextSymbolizer>
<Label>
<ogc:PropertyName>NAME</ogc:PropertyName>
</Label>
<Font>
<CssParameter name="font-family">Sans-Serif</CssParameter>
<CssParameter name="font-style">normal</CssParameter>
<CssParameter name="font-size">20</CssParameter>
<CssParameter name="font-weight">bold</CssParameter>
</Font>
<Fill>
<CssParameter name="fill">#ADFF2F</CssParameter>
</Fill>
</TextSymbolizer>
</Rule>
<Rule>
<Name>Grass</Name>
<Title>Grass - 1:65,000 to 1:150,000</Title>
<Abstract>A Land Use style</Abstract>
<ogc:Filter>
<ogc:PropertyIsEqualTo>
<ogc:PropertyName>AREA_CODE</ogc:PropertyName>
<ogc:Literal>CED</ogc:Literal>
</ogc:PropertyIsEqualTo>
</ogc:Filter>
<MinScaleDenominator>65000</MinScaleDenominator>
<MaxScaleDenominator>150000</MaxScaleDenominator>
<PolygonSymbolizer>
<Fill>
<CssParameter name="fill">#90EE90</CssParameter>
<CssParameter name="fill-opacity">1</CssParameter>
</Fill>
<Stroke>
<CssParameter name="stroke">#6B8E23</CssParameter>
<CssParameter name="stroke-opacity"></CssParameter>
<CssParameter name="stroke-width">1.4</CssParameter>
<CssParameter name="stroke-linejoin">round</CssParameter>
<CssParameter name="stroke-linecap">round</CssParameter>
</Stroke>
</PolygonSymbolizer>
<TextSymbolizer>
<Label>
<ogc:PropertyName>NAME</ogc:PropertyName>
</Label>
<Font>
<CssParameter name="font-family">Sans-Serif</CssParameter>
<CssParameter name="font-style">normal</CssParameter>
<CssParameter name="font-size">20</CssParameter>
<CssParameter name="font-weight">bold</CssParameter>
</Font>
<Fill>
<CssParameter name="fill">#6B8E23</CssParameter>
</Fill>
</TextSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>

我目前有这个代码

import xml.etree.ElementTree as ET
from lxml import etree
# Run once per file
StyledLayerDescriptor = ET.Element("StyledLayerDescriptor",version="1.0", )
NamedLayer = ET.SubElement(StyledLayerDescriptor, "NamedLayer")
Name = ET.SubElement(NamedLayer, "Name")
Line_county_electoral_division_region"
UserStyle = ET.SubElement(NamedLayer, "UserStyle")
Name = ET.SubElement(UserStyle, "Name")"
FeatureTypeStyle = ET.SubElement(UserStyle, "FeatureTypeStyle")
# Run once per rule in file
Rule = ET.SubElement(FeatureTypeStyle, "Rule")
Name = ET.SubElement(Rule, "Name")
Line_county_electoral_division_region"
Title = ET.SubElement(Rule, "Title")
Abstract = ET.SubElement(Rule, "Abstract")
Filter = ET.SubElement(Rule, "Filter")
PropertyIsEqualTo = ET.SubElement(Filter, "PropertyIsEqualTo")
PropertyName = ET.SubElement(PropertyIsEqualTo, "PropertyName")
Literal = ET.SubElement(PropertyIsEqualTo, "Literal")
MinScaleDenominator = ET.SubElement(Rule, "MinScaleDenominator")
MaxScaleDenominator = ET.SubElement(Rule, "MaxScaleDenominator")
PolygonSymbolizer = ET.SubElement(Rule, "PolygonSymbolizer")
Fill = ET.SubElement(PolygonSymbolizer, "Fill")
Stroke = ET.SubElement(PolygonSymbolizer, "Stroke")
TextSymbolizer = ET.SubElement(Rule, "PolygonSymbolizer")
Label = ET.SubElement(TextSymbolizer, "Label")
PropertyName = ET.SubElement(Label, "PropertyName")
Front = ET.SubElement(TextSymbolizer, "Front")
Fill = ET.SubElement(TextSymbolizer, "Fill")
ET.SubElement(Fill, "CssParameter", name="fill")
ET.SubElement(Fill, "CssParameter", name="fill-opacity")
ET.SubElement(Stroke, "CssParameter", name="stroke")
ET.SubElement(Stroke, "CssParameter", name="stroke-opacity")
ET.SubElement(Stroke, "CssParameter", name="stroke-width")
ET.SubElement(Stroke, "CssParameter", name="stroke-linejoin")"
ET.SubElement(Stroke, "CssParameter", name="stroke-linecap")
ET.SubElement(Front, "CssParameter", name="font-family")
ET.SubElement(Front, "CssParameter", name="font-style")
ET.SubElement(Front, "CssParameter", name="font-size")
ET.SubElement(Front, "CssParameter", name="font-weight")
ET.SubElement(Fill, "CssParameter", name="fill")
Output = ET.ElementTree(StyledLayerDescriptor)
Output.write("SLD_Test.xml", xml_declaration=True, encoding='UTF-8')
parser = etree.XMLParser(remove_blank_text=True)
tree = etree.parse("SLD_Test.xml", parser)
tree.write("SLD_Test.xml", pretty_print=True)

此代码用于生成打印 xml 树

我不仅要更改命名空间，还要重新格式化 xml 的结构，例如 1.0 版无法识别，但在 .

我不是在寻找完整的解决方案，因为我试图掌握python和XML。任何帮助都会很棒！甚至是指向有用教程的链接

Answer 1

从我从问题中收集到的信息来看，该任务涉及进行以下更改：

• 将 http://www.opengis.net/se 元素映射到具有相同本地名称的 http://www.opengis.net/sld
• 将CssParameter元素更改为SvgParameter，保留属性
• 删除 xmlns：gml="http://www.opengis.net/gml">
• 将 ISO-8859-1 转换为 UTF-8

你的问题中缺少一些单词，所以我并不完全理解所有规则。无论如何，您都需要仔细查看SLD 1.1和1.0之间的差异，以确保您有针对差异的规则。不要忘记，您可以通过不为输入文件未使用的差异编写规则来作弊。

这是一个简短的Python程序(sld11-10.py(，它从输入中读取每个XML文件 目录，然后创建一个输出目录并写入相同的 在相同目录中具有相同文件名的目录结构， 但内容如描述所示。

#!/usr/bin/env python3
from lxml import etree
import os
import sys
sld10 = etree.XMLSchema(
etree.parse("http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd"))
sld11 = etree.XMLSchema(
etree.parse("http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd"))
transform = etree.XSLT(etree.parse("sld11-10.xsl"))
def walk(sour_dir: str, dest_dir: str) -> None:
os.mkdir(dest_dir)
for item in os.listdir(sour_dir):
sour_path = os.path.join(sour_dir, item)
dest_path = os.path.join(dest_dir, item)
if os.path.isdir(sour_path):
walk(sour_path, dest_path)
else:
sour_doc = etree.parse(sour_path)
if not sld11.validate(sour_doc):
print(sour_path, sld11.error_log.last_error)
dest_doc = transform(sour_doc)
if not sld10.validate(dest_doc):
print(dest_path, sld10.error_log.last_error)
dest_doc.write(dest_path,
pretty_print=True, xml_declaration=True, encoding="UTF-8")
return None
if __name__ == "__main__":
walk(sys.argv[1], sys.argv[2])

以下是引用的 XSLT 文件sld11-10.xsl：

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
xmlns:se="http://www.opengis.net/se"
xmlns:ogc="http://www.opengis.net/ogc" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:sld="http://www.opengis.net/sld"
exclude-result-prefixes="sld se">
<xsl:output encoding="UTF-8"/>
<!--
Chanage the version and the schemaLocation values
-->
<xsl:template match="/sld:StyledLayerDescriptor">
<StyledLayerDescriptor xmlns="http://www.opengis.net/sld"
xmlns:ogc="http://www.opengis.net/ogc"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:gml="http://www.opengis.net/gml">
<xsl:apply-templates select="@*"/>
<xsl:attribute name="version">1.0.0</xsl:attribute>
<xsl:attribute name="xsi:schemaLocation"
namespace="http://www.w3.org/2001/XMLSchema-instance">
<xsl:text>http://www.opengis.net/sld </xsl:text>
<xsl:text>http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd</xsl:text>
</xsl:attribute>
<xsl:apply-templates/>
</StyledLayerDescriptor>
</xsl:template>
<!--
Map SvgParameter elements in the http://www.opengis.net/se namespace
to CssParameter in the http://www.opengis.net/sld namespace
-->
<xsl:template match="se:SvgParameter">
<xsl:element name="CssParameter" namespace="http://www.opengis.net/sld">
<xsl:apply-templates select="@*"/>
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
<!--
Map remaining http://www.opengis.net/se elements and attributes
to the http://www.opengis.net/sld namespace
-->
<xsl:template match="se:*">
<xsl:element name="{local-name()}" namespace="http://www.opengis.net/sld">
<xsl:apply-templates select="@*"/>
<xsl:apply-templates/>
</xsl:element>
</xsl:template>
<!--
Preserve all other elements and attributes
-->
<xsl:template match="*|@*">
<xsl:copy>
<xsl:apply-templates select="@*"/>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
<!--
Preserve processing instructuions and comments
-->
<xsl:template match="processing-instruction()|comment()">
<xsl:copy>.</xsl:copy>
</xsl:template>
</xsl:stylesheet>

if name == "main": walk(sys.argv[1], sys.argv[2]部分意味着 当您从命令行运行程序时，它将使用第一个 两个命令行参数作为步行例程的输入。例如 假设你有sld11-10.py、sld11-10.xsl和input_directory桌面，然后说input_directory包含这样的文件

input_directory
file1.xml
file2.xml
subdirectory
file3.xml

然后，假设您没有名为output_directory的目录，则 可以像这样运行文件

sld11-10.py input_directory output_directory

该程序将创建具有以下结构的output_direcory：

output_directory
file1.xml
file2.xml
subdirectory
file3.xml

input_directory和output_directory之间的区别在于output_directory中的 XML 文件将经过 XSLT 转换。 另请注意，在转换期间，有关 XML 文件的有效性，SLD 1.0 和 SLD 1.1 都将写入 过程中的屏幕。