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xml-lens: Lenses, traversals, and prisms for xml-conduit

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This package provides DOM selectors based on lenses and prisms. See README.md for examples

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Versions [RSS] 0.1, 0.1.1, 0.1.2, 0.1.3, 0.1.4, 0.1.5, 0.1.6, 0.1.6.1, 0.1.6.2, 0.1.6.3, 0.2, 0.3, 0.3.1
Change log CHANGELOG.md
Dependencies base (>=4 && <5), case-insensitive, containers (>=0.4.0 && <0.8), lens (>=4.0 && <5.5), text (>=0.7 && <1.3 || >=2 && <2.2), xml-conduit (>=1.1 && <1.10) [details]
License BSD-3-Clause
Copyright Copyright (C) 2021 Fumiaki Kinoshita
Author Fumiaki Kinoshita
Maintainer Fumiaki Kinoshita <fumiexcel@gmail.com>
Revised Revision 4 made by jack at 2025-07-01T01:44:31Z
Category XML
Home page https://github.com/fumieval/xml-lens
Bug tracker https://github.com/fumieval/xml-lens/issues
Source repo head: git clone https://github.com/fumieval/xml-lens.git
Uploaded by FumiakiKinoshita at 2022-05-15T11:18:51Z
Distributions NixOS:0.3.1
Reverse Dependencies 8 direct, 1 indirect [details]
Downloads 11317 total (17 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2022-05-15 [all 1 reports]

Readme for xml-lens-0.3.1

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xml-lens

Lenses and traversals for xml-conduit.

Example

> doc <- Text.XML.readFile def "examples/books.xml"

> doc ^.. root . named "books" ... named "book" . attributeIs "category" "Textbooks" ... named "title" . text
["Learn You a Haskell for Great Good!","Programming in Haskell","Real World Haskell"]

> lengthOf ?? doc $ root . named "books" ... named "book"
7

> doc ^? root . named "books" ... attributeIs "category" "Joke" ... named "title" . text
Just "Functional Ikamusume"

> doc & root . named "books" ... named "book" ... named "pages" . text <>~ " pages" & renderLBS def & BL.putStrLn

<?xml version="1.0" encoding="ISO-8859-1"?>
<books>
<book category="Language and library definition">
    <title>Haskell 98 language and libraries: the Revised Report</title>
    <author year="2003">Simon Peyton Jones</author>
    <pages>272 pages</pages>
    <price>£45.00</price>
</book>
<book category="Textbooks">
    <title>Learn You a Haskell for Great Good!</title>
    <author year="2011">Miran Lipovaca</author>
    <pages>360 pages</pages>
</book>
<book category="Textbooks">
    <title>Programming in Haskell</title>
    <author year="2007">Graham Hutton</author>
    <pages>200 pages</pages>
</book>
…

Tips

  • Use cosmos to traverse over all children
  • You can do or-composition of traversals with failing