What Is fop.jar? I got it from the fop-2.7-bin.zip.

fop.jar in fop-2.7-bin.zip is the JAR file for FOP 2.7, which is a print formatter driven by XSL formatting objects (XSL-FO). You can obtain fop.jar from the build folder of the fop-2.7-bin.zip file.

Below is the information about the fop.jar (2.2) file:

JAR File Size and Download Location:

JAR name: fop.jar, fop-2.7.jar
Target JDK version: 1.7
File name: fop.jar
File size: 4442817 bytes
Release date: 20-Jan-2022
Download: Apache FOP Website

Java source code files for fop.jar:

⏎ org/apache/fop/fo/properties/CommonAural.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id: CommonAural.java 1681384 2015-05-23 21:07:13Z adelmelle $ */

package org.apache.fop.fo.properties;

import org.apache.fop.fo.PropertyList;

/**
 * Stores all common aural properties.
 * See Sec. 7.6 of the XSL-FO Standard.
 * Public "structure" allows direct member access.
 */
public class CommonAural {
    // @SuppressFBWarnings("UUF_UNUSED_PUBLIC_OR_PROTECTED_FIELD")
    /**
     * The "azimuth" property.
     */
    public int azimuth;

    /**
     * The "cueAfter" property.
     */
    public String cueAfter;

    /**
     * The "cueBefore" property.
     */
    public String cueBefore;

    /**
     * The "elevation" property.
     */
    public int elevation;

    /**
     * The "pauseAfter" property.
     */
    public int pauseAfter;

    /**
     * The "pauseBefore" property.
     */
    public int pauseBefore;

    /**
     * The "pitch" property.
     */
    public int pitch;

    /**
     * The "pitch-range" property.
     */
    public int pitchRange;

    /**
     * The "playDuring" property.
     */
    public int playDuring;

    /**
     * The "richness" property.
     */
    public int richness;

    /**
     * The "speak" property.
     */
    public int speak;

    /**
     * The "speak-header" property.
     */
    public int speakHeader;

    /**
     * The "speak-numeral" property.
     */
    public int speakNumeral;

    /**
     * The "speak-punctuation" property.
     */
    public int speakPunctuation;

    /**
     * The "speech-rate" property.
     */
    public int speechRate;

    /**
     * The "stress" property.
     */
    public int stress;

    /**
     * The "voice-family" property.
     */
    public int voiceFamily;

    /**
     * The "volume" property.
     */
    public int volume;

    /**
     * Create a CommonAbsolutePosition object.
     * @param pList The PropertyList with propery values.
     */
    public CommonAural(PropertyList pList) {
    }
}

⏎ org/apache/fop/fo/properties/CommonAural.java

Or download all of them as a single archive file:

File name: fop-2.7-src.zip
File size: 3401312 bytes
Release date: 2022-01-20
Download 

⇒ "fop" Command in fop-2.7-bin.zip

⇐ What Is fop-2.7-bin.zip

⇑ Download and Installing of FOP 2.x

⇑⇑ FAQ for FOP (Formatting Object Processor)