xmllint 命令

常用示例

说明

xmllint is a command-line XML parser and processor from the libxml2 library. It can parse XML files to check for well-formedness, validate documents against DTDs or schemas (XSD, RelaxNG), format XML for readability, and query documents using XPath expressions. The tool is indispensable for working with XML data in shell scripts and automated workflows. It can detect syntax errors, validate against various schema types, extract specific data using XPath, and transform or clean up XML output. Common uses include validating configuration files, extracting data from XML APIs, formatting machine-generated XML for human readability, and preprocessing XML before further transformation with XSLT.

参数

--format

Reformat and reindent the output

--valid

Validate against the DTD declared in the document

--schema _file_

Validate against the specified XSD schema

--relaxng _file_

Validate against a RelaxNG schema

--dtdvalid _file_

Validate against the specified DTD

--xpath _expression_

Evaluate XPath expression and print results

--output _file_, -o _file_

Write output to specified file

--noout

Suppress normal output (useful with validation)

--noblanks

Remove ignorable blank nodes from output

--encode _encoding_

Output in specified encoding

--html

Parse input as HTML instead of XML

--recover

Try to recover from parsing errors

--nonet

Don't fetch external entities from network

--c14n

Canonicalize output (for digital signatures)

--shell

Enter interactive shell mode

--version

Display version information